Help! Need opinions

So my periods are pretty regular well I started sept. 21 and I bled til the 22nd my fiancé and I had sex the 23 Rd and 24th he finished inside well i figured my period would have continued and it didn't. Is there a chance I could get pregnant?  Also glow said I ovulated the 1st and today is the last day and during that time I have had a headache almost every day, little nauseous my boobs are tender, and been having cramps.