5 dpo, but feeling extremely nauseous.

This is month 5 of TTC. I used the advanced digital opk's from Clearblue and according to those I am 5 DPO. Yesterday I had some bad cramping and some very light spotting (it was light pink in color). Today I have been nauseous just about all day. It comes and goes. I've also been having hot flashes. I'm hoping these are VERY early pregnancy signs, but from all of my research it's too early for this to be happening. Has anyone else experienced these symptoms this early and turned out with a BFP?! I am trying so hard not to get my hopes up. We are trying for our rainbow baby. Our first daughter was still born due to Trisomy 18. I gave birth to my sleeping daughter August 28, 2015.