Delusional!?

I think I have a problem maybe psychological. The only sex I had " recently" was in September 2018. Since then I haven't missed periods, no pregnancy symptoms or whatever. My period was late in october though ( didn't get my period that month) but i had at the beginning of november. Then in december I had 2 periods at the start and the end of month. I am guessing my cycle got messed up because i took 2 morning after pills in a week after sex. ( crazy i know but i didnt know it coule mess my cycle that much). I am so scared of being pregnant that ever since i had sex i am anxious about being pregnant despite having taken the morning after pill, had normal heavy periods. Am I being delusional to convince myself I am pregnant? Also my anxiety is worse each month at around ovulation time and some days before period. How many months pregnant would I be if i had had sex in September? I would have had a bump by now if i was right? I dont want to get a pregnancy test because deep down i know it is impossible for me to be pregnant.