Spotting after stopping meprate.

I took meprate twice daily for 5 days to delay my periods(I started taking it around three days before onset of my periods. My dates are not fixed). On the 6th day I forgot to take my dose at night and next morning I got heavy bleeding which lasted for around four days. Then after 6 days I started noticing bloody spot in my pants. From then I was always having blood in my vaginal discharge. I also experience gas and slight cramping at times. This is the 8th day after this symptom started and I'm very worried. Today the blood in my discharge has reduced a lot but I still feel gassy and discomfort. Is this side effect of meprate??? While I was taking meprate I had sexual contact with my boyfriend. We did not have proper intercourse but we were naked and his penis did touch my vagina because of carelessness (he did not ejaculate). So I'm stressed out thinking if it's pregnancy by any chance.