So on Nov 8th my BF and I were messing around. I was giving him a ha****b and some cum was coming out before I stopped because people were walking by. He did not fully ejaculate. To get me back in the mood he started fingering me deeply. Afterward he confessed that he had some of his fluid on his hand. It’s now December 4 (almost a month later) and last week when I was supposed to get my period it was a supper light, almost spotty, flow and was super dark. It lasted for 5 days. I took a pregnancy test the second day I was bleeding and it come out negative, but could I still be pregnant?