am I pregnant ??

okay so before I start I am used to having really light periods, 2 years ago throughout the entire year I only had to use liners! I have been having unprotected sex (15 times in total) but he has NEVER came so no cum has entered or been in my vagina!! ALSO I HAVE SKIPPED MY PERIOD 3 MONTHS IN A ROW up until now AND IVE ONLY BEEN ON THE PILL FOR 5 MONTHS anyway I got my period when I started the row of sugar pills but I got my period 3-4 days in , there was a decent amount ( like 2 50cent coins next to eachother size) throughout the entire day anyway and then when I slept there was a tiny amount and then I used tampon the next day and I only filled up like half a tampon and the next day was the same except brown this time and then the next 3 days was brown stuff, I'm just wondering if that's normal or if that could be like a problem and I'm pregnant or some shit idk, the bleeding has stopped ??? Sorry this is really confusing HAHA