In the august I had a period which was normal in lasted 5 days then again I had another period on the 29th of august which lasted 7 days. But I did have sex the 5th day of this cycle then it came back in lasted 7days. About a wk n half later I had browinsh spotting foe almost a week. I took 4 test all said neg then at the end of sept 30 had a period. My boyfriend always pulls out we never use condoms...WHAT COULD THIS MEAN PLEASE HELP...