If you have regular 28-30 day cycles, then you were in the safe period when you had the unprotected intercourse
and you are safe. Your symptoms could be premenstrual. You may take a home pregnancy
test with a fresh early morning sample of urine 3-7 days later, if you miss your next period. Else, if you wish for an earlier confirmation, you can get a serum beta-hCG
test about a week prior to the onset of your next cycle. Hope this information is useful. Take care.