Implantation cramp question...

Alissa • 30yo - been with fiancé for 9 years 💍 TTC baby #1 since Sept 2014 ❤️ 1st cycle IVF w. ICSI: in process!
I'm currently 12DPO... I had cramping today and yesterday... Could I have cramping more than 1 day during implantation? TIA:)