2 days late

So last Sunday I had brown like discharge on my underwear but not when I wiped.. ( I had back pain and little cramps along with itI thought maybe my period was coming.. or it’s a sign it’s coming.. I’m now 2 days late and I have some back pain and little bit of cramps but that’s all.. I did have unprotected sex after my period and like 2 days before my ovulation day (according to glow) could I be pregnant? I don’t have crazy symptoms but constipated and discharge.. (which I know means nothing)