If this is the last time you can take the ASTB AND your GPA is not good, would suggest you also raise your GPA before submitting or you would be in danger of getting DNR'd (i.e. prevented from ever applying again to this designation in the future). Also note that your latest test score is always used, even if it happens to be lower than previous attempts.
The problem is the fact that the GPA after a Bachelor's degree is almost fixed in stone and is very hard to change.
I.E. If he had a 2.0 GPA with 120 semester hours, and went on to get a M.S. degree with a 4.0, his GPA would adjust to a range between 2.46-2.62. This would also apply to any additional amount of hours beyond the 120 semester hour mark, whether that is pursuing an Associate's, second Bachelor's, or Master's. You will get to a point of diminishing returns.
Going for another 120 credit hours at a 4.0 would change a 2.0 into a 3.0 (720 quality hours divided by 240 semester hours), but that's a huge additional cost in time and money. There is no minimum GPA for SNA/SNFO right now and to do another four years with straight A's for one whole GPA point bump seems silly.
I got a 49 4/5/6 which still isn’t good enough. I hope to do well on the third try and get minimum of 7s. I have a bachelors degree in Biology from Penn State however my GPA is super terrible, so I really have to do well on my ASTB in order to try and get accepted into the SNA or SNFO program. I know you can only take the ASTB 3x, but does anyone know what happens if you don’t qualify? would you be able to change the program you’re applying to?
The fact that you've already been in to talk the OR and take the ASTB twice says to me that they like you and probably think you're competitive, or else they wouldn't waste their time with having you come back for a third and final test.
Since this is the last retake, take your time. If you feel like you're not ready, adjust the date. If you're too young to require an age waiver, time is on your side.
Currently, you're qualified, you meet the minimum OAR to apply for the board, and you also meet the minimums for SNA and NFO, but if you want to be a pilot, they may not even submit your kit with the 5. I've seen many people get selected with a 6 in their applied category. Once you hit the required OAR, OAR is not considered for the pilot board. The OAR score just makes it possible to submit your kit to the board assuming you have at least a 6 in PFAR and FOFAR. If you don't qualify, you look at other jobs that you do qualify for purely based on the OAR. Buy study guides, watch YouTube videos, and nail that third test when you're ready. Changing from SNA/NFO to a job you qualify for is as easy as the recruiter circling a different category/board on your kit, so that's nothing to worry about.