7 or 9dpo BFP?!!!

So yesterday I tested and knew I wasn't tripping when I saw that faint line but figured it wasn't since it's blue dye. Tested earlier this morning like 1am (yeah haven't been able to sleep since realizing I might be) and again this morning at around 7 and I see the faint line more clearer than yesterday. With my rainbow I took a dollar store test at 7dpo and it came back positive tested again at 9dpo was positive and 12dpo same. I guess what's freaking me out is the fact that I knew this would happen but wasn't expecting it due to the fact that I'm 8 weeks postpartum to baby #6 and my mind has been overwhelmed taking care of Irish twins. (1 year old and 1 month old). I'm not even sure when my actual first period came whether it was the 25th(which would put me at 9dpo and makes more sense since the 3rd and the fourth of november would be day 1&2 of my fertile window) or the 27th which would put me at 7dpo and putting me 1-2 days before the start of my fertile window. SO is happy as heck which is a relief but I'd be lying if I said I wasn't freaking out especially since I'm due to return back to work from maternity leave this Friday. Jesuuuuusss!!! Lbvs