Help!

Jackie

Today I am 12dpo and I've been getting bfn since 9dpo. The night of 10dpo I started getting AF like cramps and I thought for sure she was coming early because I never have cramps like this unless I start AF the same day but she hasn't made an appearance!! I'm still having them on and off and since 11dpo have a heavy feeling by my uterus too. Maybe I'm just having implantation cramps? But this late in my cycle? Has anyone else experienced this and got a BFP??