I have the exact same thing my friend. I subconsciously clench my jaw and grind my teeth when I'm on cycle. Its great because it lets me know my test is legit.......
As far as AI, I am of the belief that you shouldn't use it till you have sides. Others are of the belief that you should take it as soon as your first pin. Its up to you to weigh up the risk/reward ratio in your head and decide. Basically without bloods, you will never truly know where your estrogen is it. If you want to be 100% safe, take a small dose of AI, get bloods, see where your estro is at the adjust from there.

See if you can get your hands on some clomid for your PCT. Proper PCT is the most important part of any cycle.