However, In Test 4, I paused in Verbal for about 2-3 min. when I had 5 min left, because I was panicking and I did not want to end up with a score as in test 3. In test 5 too I paused for about a min, because I was reading the same line again and again as I panicked that I will run out of time. I did that to calm myself down, but that was when I had 3 min left and 3 questions to answer.
Do not EVER use the pause button again. It doesn't exist. You panicked on two different tests and you didn't give yourself the opportunity to figure out how to work through that panic anyway during a practice situation. What's going to happen on the real test when you panic and can't hit the pause button? You have to find a way to calm yourself down
while still following the official test rules - because that's how it's going to be on test day.
I just don't give up if I am confused
You need to train yourself to give up sometimes. It doesn't matter how good you get - the test can ALWAYS just give you something harder. This test is not just testing you on whether you know the material and can answer the questions. It's also testing you on whether you can set priorities and manage your time appropriately (as any good businessperson should know how to do!). Think about your average workday - sometimes there are things you have to leave till tomorrow or next week, right? Sometimes there are things you have to give to somebody else or say you can't do.
Same thing on this test. Sometimes you just have to say, "Yeah, that's not going to happen right now" and you need to move on BEFORE you have
lost time on that question.
We'll assume that your current scoring range is in the high 600s (CATs 4 and 5 were possibly slightly inflated by using the pause button, and CAT 5 was also inflated because it seems you ran out of hard quant questions at the end). (The pattern before that was likely fine, by the way - it isn't always the case that you have to get multiple 700s wrong before dropping to 600. Just depends upon performance on that test.)
It looks like you have a good shot to break 650, as you said, but you'd probably want to do a bit more work to be more confident of a 700+ score. You don't mention a particular deadline by which you need to take the test, so I will assume you don't have any pressing dates. If you wanted to get extra help, then a class or tutor may be very valuable for you to push that last bit. A class has the benefit of being less expensive and more comprehensive overall, but less efficient; tutoring has the benefit of being tailored specifically to your needs, but it is much more expensive. The most important thing is to make sure you find a teacher (whether for a class or tutoring) who works for you: someone from whom you think you can learn easily and well.
If you choose a class, try to see the teacher in action before you decide. Most companies (mine included) offer various free classes, so you can see how the teacher teaches before you actually sign up.
If you work with a tutor, you should have access to a bio or other information that will let you know the tutor's experience before you officially agree to the tutoring (in other words, you should be able to check the person out and decline to work with that tutor if you don't want to for any reason).
You should have an email or phone conversation with the tutor before you officially meet for a paid tutoring session, and the tutor should ask you some questions about your strengths and weaknesses and / or give you some kind of work to do before the first meeting (for example, an MGMAT tutor might ask you to take an MGMAT test, if you haven't already, so that s/he can review your results before the session).
Also, if you work with a teacher / tutor, ask him/her to help figure out what went wrong on test 3 and how you can avoid having that happen again - that's the biggest problem sticking out right now, because what you described (a lot of early CR and RC) is something that's not within your control, and you don't want to just sit around and wait for that to happen again. There may have been other things going on as well - things that are within your control. (The article I linked last time may also help you to figure that out.)