Constant Panic Attack

Ilana
I have never had unprotected sex in my entire life. Actually, me and my boyfriend (of 3 years) haven't even actually had SEX in about a year due to the fact that I over analyze every irregularity in my cycle and credit it to the possibility of being pregnant. Then I panic for a week or two. We stopped having sex, but we still fool around often (making out, oral...etc.) Despite this change, I still put together a scenario every month of how I probably got pregnant...to the point of making myself extremely naseous from stress. Does anyone else do this? Is it normal? Any suggestions on how to come back to reality and relax?