Around 2 weeks ago me and my boyfriend were fooling around and he ejaculated. We were not having sex though. He cleaned it up with a tissue and said he did not get any on his hand, but in the heat of the moment he fingered me. I got my period a day or two late the following week and lasted around 5 days like normal; however, 4-5 days after it came back and lasted 3 days. This period was like a normal period once again.Once this second period was done, my boyfriend ate me out and fingered me, there was no blood on his fingers when he was done, it just had an irony smell. 2 days after that I got a very light period that only lasted that day.What could this be?