I had unprotected sex n am wondering if I could be pregnant finally.?

Im 27 had unprotected sex jan 21st-23st and had wat id like to think was my period feb 8th dat started really light only used a tampon da next day which I probably didnt need da rest of the days up to the 10th which it stopped compeltely. I had sex again 11th 12th 14th 15th. Just today I went to the bathroom and it was very light like a spot on the tissue barely noticed. Is it a chance I could be pregnant I do want to be.