I'm really not sure? 😭

I had unprotected sex on the 18th of feb but i'm not sure if he came or not and we arn't exactly on speaking terms at the moment for me to ask something like that. My periods are irregular but they do normally start around the 20th + but last month it didn't start however after i was getting constipation and cramps. Cold/flu like symptoms. Quite tired And its continued but with no cramps. A little bloating. I'm needing to go for a wee more than usual. Im getting dry mouth quite alot i'm sleeping through the day and im always hungry. Also getting watery discharge. Can someone tell me if they think my period is on its way still or that it could end up pregnant. Please?