Spotting at 11dpo bfn, 13dpo still no AF

Lauren • Married August 2014, boy mom, first 💙 born July, 2016, #2 💙 born December, 2018.
Anyone ever have a bfn at 11dpo and end up being pregnant? I'm looking for anything to keep my hopes up but it's hard. I tested at 11dpo with fmu and got a bfn. An hour later when I went to the bathroom I had the lightest pink spotting only when I wiped. I thought it was for sure AF starting. But absolutely nothing since and it's now two days later. A little cranky all week and cramps. My boobs are super sore near my armpits.