11days /Dpo advice please

Hey girls, I'm 11 days past ovulation (according to this app) & af is due on the 25th i recently stopped the pill but I know I ovulated because I had the signs of it, anyway, I had unprotected sex around that time more than once with my partner, I took a test at 10dpo and got a neg! But I've all of a sudden got all this discharge, I've had all these different bowel movements, been gassy, feeling sick so easily, and today got cramps that were moderate, I have never ever had any period signs before in my life so I don't think it has anything to do with my period, I've been quite tired and moody, I'm quite nervous as well! What advice could you please give me?