hey guys i literally downloaded this app just for advice! i have 3 children 2 that came really early 33 weeks and 28 weeks. we are NOT TTC. however last month on the 10th my husband "accidently" forgot to pull out...grrrr i was ovulating at the time he went inside of me. i toon plan B and then found out it doesnt do anything once u have already ovulated....anyways 2 days before my period was due i spotted one tiny light pink little smear then nothing for another day. then i started having my period but it was lighter than usual but def enough to wear a pad or tampon. it lasted 2 to 3 days....so i sighed with relief thinking Plan B has worked....now this month my period is due on the 29th. however a week ago my boobs started hurting REALLY bad (typically) they get a little sore 2 days prior to period but we are talking 10+ days before period. they have continued to hurt like crazy and nipples super sensitive. also i got a bit of nausea yesterday randomly and have been craving pineapples which I HATE and in all 28 years of my life i have eaten it like once because its disgusting but this week ive eaten it daily! my husband is freaking out im freaking out. ive take a DG 1dollar test it was negative and then a 4dollar test also a bfn. so after all this heres my question...

-Could plan b have failed and im actually prego from last month making me around 8 weeks but no BFP?

-or is possibly im 3 weeks pregnant and have symptoms but no BFP?

-is it possible to have symptoms without implantation?