If I'm reading all this right, you took bloods at 3.5 weeks and your E was in the normal range. But then you dropped your AI? And now it's 3 weeks later with no AI. So your 6 weeks into a 16 well cycle, Is that right?
Do you know what your BF % is? I only ask because if you're carrying a little bit of abdominal fat you're likely we converting at a bit higher rate then you realize. From what you say, it seems like your estrogen has gone back up... But also you could be retaining a lot of water. I would be if I was taking 600T with no AI. New bloods is the only way to know for sure.
What to do? Well, how do you feel? You seem to be getting stronger... You probably look bigger... Can you deal with the puffy nipples? If so, maybe consider just a carrying on. Or, since you know you WERE taking the right amount of AI (because your bloods were normal), go back on AI as you mentioned you had. it really comes down to how you feel. I'd keep an eye on your blood pressure, if you feel like you're retaining water, that could add to it... But that's an awfully high blood pressure. Hopefully it was just a fluke reading.
This is your first cycle, so I'd keep running only the Test... But you could add a little Masteron to alleviate some of the nipple stuff If you chose not to run an AI.
If you want someone to tell you what to do... I would tell you to get new blood work which will tell you (for future cycles) how much 600 Test effects your E. and If you can deal with the side effects at your given estrogen level, do it. If you're really uncomfortable, add a small amount of AI and bring it down a bit.
Please do your own research, and make the decision you feel is best for you. Don't listen to me or anyone else who you've never met, lol.
Best of luck,
C-