Pain in pelvic after intercourse. 3days?

I am 24 and have PCOS. When i lift weights for atleast 20-25 days a month i get periods. So this condition is manageable if i workout in gym. This month i missed period because not having proper visits to gym. I was due on 8th may but did not menstruated so I took pregnancy test for being sure if i am not pregnant and the test came negative. So yesterday I started taking deviry 10mg twice for 5 days to get periods. But today afternoon I had unprotected sexual intercourse (sperms were not discharged into vagina or anywhere near it) and my pelvic area is hurting since then like i am having cramps. I never experienced this cramps and pain after sexual intercourse before. The intensity of pain is mild now but immediately after sex I was unable to walk or sit. Is there any chance that i am pregnant? Shall I take emergency contraceptive pill and stop deviry? Or shall I not take emergency contraceptive pill n continue deviry for remaining 3days? Please suggest