I fingered up my vagina and felt uterine tissue coming out through the dilated cervix after a medical abortion @8th gestational week. Is this normal?

Tissue passage. A medical abortion uses a combination of two pills to start the cramping and passage of the fetal tissue that you have already noted. More importantly, you have increased your risk of intra uterine infection by placing your finer through the dilated cervix with its attendant bacterial content. Hopefully, you are also taking antibiotics and will return to the abortion MD for a post abortion exam.