PLEASE help.

My period is usually around the 19th & lasts until the 20th. This past month I missed about a week of my pill (I wasn't home & forgot them) and was having unprotected sex, no condom or pull out method. On August 1st (or 2nd not 100% sure) I had what seemed like a period, but I'm not sure if it was just because of missing my pill. Tonight I had unprotected sex again, same thing as usual, did my ovulation dates change at all? Will I still get my period the 19th? And are there greater chances of pregnancy after I just had sex because of this whole thing?

UPDATE: I DID get my period at my usual time last month, in addition I got what seemed to be like a "second period."