Implantation???

Gemma

Hi so iv ben ttc since my Mmc in 2011. Am 12dpo today and got a bfp this morning. I'm in shock as I thought af was coming as on Sunday I had a tiny bit of pink spotting. Any way today I got my bfp and tonight I have some more spotting very light pink and only a tiny amount. Av got cramps but there not painful there like gassy cramps as soon as a fart it eases. Sorry tmi lol. Can anybody reassure me please at all. Thanks xxx