Could I be pregnant!!

I had my last period Aug 19,2019

My husband and I had unprotected sex

Aug 26,28,30 Sep 1 which was ovulation day! ,Sep 3

I went to the hospital Sep 7. 2019

I broke out in hives, had a very bad allegeric reactions to crab legs.

Then my period started Sep 11, 2019 which it wasn't due to start until Sep 15, 2019.

I've been feeling light headed a lot not being able to sleep at night, have slight headaches in the morning. Could I be pregnant or not?