Test aromatizes. AI = aromitization inhibitor. Lower test will aromatize less.
Some symptoms include the classic irritated nipples, a lump in your nipple area, softer erections, not able to maintain an erection or ejaculate, irritability, anxiety and the list goes on.
Without blood work you can't say for certain, but I really don't think it's low estrogen based on the amount of test you use. Get blood work done, but taking an AI isn't the end of the world. Best case scenario it lowers your estrogen and you're back in the game. Worst case for a week or so you may feel similar symptoms you as having high e2. If you don't get ahead of high e2 you will have issues. Get checked out.
Aromasin I believe is a form of steroid. Search online for more info on that.