Help please

So hi everyone.

I'm new here. Had a question, people here have posted so many times about having a period and being pregnant. I am confused how can you if you have a period. I mean yea I have heard you can have light or spotting but not enough to cover a pad or tampon. I personally wear pads. But how can that be true. And so can I hear what others say and where they are finding this info if it's so called true. I have been on the pill and than have skipped my period purposely a few rimes. So if I was pregnant I would have a known and be not have gotten my period after skipping it. Right that's what I would think skipped the placebos got period. Than skipping this last pack of white sugar pills and prob next bc going on vacation. And so it just stems back in early I think December prob December 3. That had some make out time with my fiancé and than I noticed he was wet but I had pants and underwear on. So there no change right. Kinda just wanna hear what you all think. So please comment. Thanks Have take. Numerous tests and Gyno apt and all negative just have had a weird line think it's called Evap line on a blue dye one. And the paper said to be same thickness as the control and it wasn't. Than all a lot I mean of my others including pink dye were all stark negative so safe to say I'm not. Right.