4dpo and I feel like I’m about to bleed (cramping)

I’m having some major cramping right now. I’m 4 dpo so I can’t be pregnant and it’s to early for my period. I’m cramping so hard that I’m nauseous. Is this normal? I remember period cramps two years ago and it got worse after my bfP but in don’t remember it this bad and in my gut I think it failed this time.