Before period?

So basically, my period was 10 days late. However, i was not pregnant and must of not of ovulated at the right time. About 4 days before my period started i had unprotected sex. My period eventually turned up but not my normal ‘period’ shall we say. It was light, slight cramps and no clots at all! I am now feeling sick, have diaherra and feeling emotional and have a crazayyy sex drive. Is it possible to have conceived and bled? I don’t feel ‘sick’ like im gonna vomit. Just feel uneasy. Is it possible to be pregnant? I fee stupid as it is asking so no horrible comments.