i had intercourse on february 28th while still on my period and my period didn't end until about two days afterwards. the next time we had intercourse was on the 9th and the 12th. I have been spotting for about a week now, and just recently it got heavier. my period is due between the 23rd and 25th. i have absolutely no pain and no pregnancy symptoms. could i be pregnant or is this a cyst?