what do late periods mean?

Alright girls..got a question here..i went off birth control pills in I believe it was august or september of 2015..we didn't have unprotected sex till 2 periods later so everything was out of my system! I've been having regular periods that last 5 days and are around a 28 day cycle..the last 2 months they have been late with a 38 and 41 day cycle?! This last period about killed me! It was dark and very heavy and extremely painful!! I've had pregnancy symptoms off and on..i used to have an iron belly and nothing made me gag but now anything does! Very annoying!! Tired, headaches, back pain which I deal with normally anyway, sick but usually in the <a href="https://play.google.com/store/apps/details?id=com.glow.android.eve">eve</a>'s with no barfing but gagging and nauseous, extremely tender breast, hubby thinks they are bigger and my nipples are purplish with wider aeolas, take note my breast aren't ALWAYS this way tho! Been very gaseous! And I don't fart in public but these don't usually give me a choice lol! I've gained quite a bit of weight..used to weigh 125 and now every bit of 145..now THATS depressing! Can't think of all my symptoms rig now but I've had about all of them and they are just off and on! I've taken several pregnancy text and all were negative! And I SO want a positive!!! Was checked by a dr bout a year ago and he said I had a high egg count and everything looked great so I don't think infertility is a problem here.. but not sure if I'm pregnant and one of the few that still get periods and test don't catch it or what's up! Any ideas?