Cramping in pelvic area/ under belly button

I'm about 11/12 dpo & I've been having cramping, tingling, pulling sensations in my uterus since the 15th 8ish dpo & I was having really bad sciatic pain then too which I haven't gotten in awhile it usually occurs most for me during pregnancy I've never really had these kind of pains that far before my other periods. My fiance & i werent trying for another baby but he came in me the last days of my period (march 1st) bc i wasnt rwally bleeding & we didnt think i would ovulate early enough to do anything. Has anyone else had this & been pregnant?

These are from other apps that I think are more accurate