pregnancy scare... I actually do want other woman's thoughts on this as well

For the past month I just been so tired, always use to be up till 3 in the morning talking to my partner and being on Facebook and now nothing, all I do is go to sleep early!! I'm so often trying to nap during the day while my kids are up and going! I had few dizziness/lightheaded spells throughout month of May and so far of this month! Last month my period was on the 11th so this month I expected it on the 11th as well but instead on the 8th I got a couple light pink sprinkles at 11pm at night then stopped so I think the 8th dont count. Usually within an hour or so after I begin to pour out a lake but this time it didn't happen like that. I still had dark bleed throughout the day of the 9th but mostly on toilet paper. The 10th throughout the day it started becoming lighter red in color and becoming less. At night was just brown spotting then stopped before the next day began. This morning I woke up with a bit of red so went restroom and a bit of red when I wiped (twice) then it stopped after that. It just came back a couple hours ago but only a bit of red and toilet paper. Right now im not sure bcuz im laying down im just so tired. I wake up early bcuz of my 2 kids and I actually can wake up early and still stay up all day and night but now nothing. I could simply end up falling asleep on my children without even realizing it. My bf isnt trying for a kid but on the 2nd of May we had unprotected sex and it was pull out method. It always worked but this time idk if it worked out as usual, my cycle is just simply way off this time. We know better and still did the deed. Knowing me its my period..."supposedly just acting up" but then I think again about pregnancy. My mind is blank, sorry ladies for my long rant that's probably not even anything. I wasn't stressing the past month either, been doing some researching but I was just reading stories of other woman's pregnancies bcuz they interest me as well but wasn't stressing so idk what it is. I'm honestly not stressing right now either, just curious. Sorry everyone.