please help I think I had a miscarriage

I could have been around 8 weeks pregnant. The baby or clot had veins, and it looked like it was in a sac, it also looked like it had eyes, a tail, arms and legs, an umbilical cord, and a spinal cord. it was C shaped, I put it in water and no blood desolved, it also had some flesh color parts to it. *we did the pull out method but had an incident, I took a pregnancy test late last night but I had peed an HR before then drank alot of fluids so idk if it came out wrong or if it was actually a actually neg. what to you guys think it is what should I do?