Cramping

Hi

I am roughly 3 weeks pregnant.. am actually not really sure. My last period was New Years and expected ovulation was on the 14th but who knows if I actually ovulated then... so to the point. I tested positive earlier this week (I think Monday) how many weeks would I be? And is cramping on my right side normal? Shouldn’t I be feeling it in my uterus as opposed to my right side? I’m new to this. Please bare with me

TIA!!!!