Anyone!?

So me and my husband had sex the whole week that was the week I was ovulating! I have had cramping and 3 days before my af was due my boobs were really sore and I was bleeding and it was a bit heavy so I had thought it was my af but it only lasted a day. Well the last couple days I have had cramping again? I have tested and it was neg! Has anyone heard of this! And is it a possibility I could be pregnant!? Please let me know your thoughts!!!!!!