Need help ladies!!!

Okay so my period is regular nd I have it for 7 days. My last normal period was Sept 13. Had unprotected sex on Oct 4, 5, 16, & 17th. I'm confused cuz I started what seemed like a period on Oct 6 except first two days were spotting, then bled heavy the next two days, then back to spotting for two. It completely stopped for a day, then I had spotting the following two days. I've taken three pregnancy tests nd two came back with very faint second lines. Like is there a chance I could be pregnant? I hate the waiting game!! I've always been ttc. I need answers, please help! ;(