Eptopic Cervical Pregnancy

After TTC for two years despite already having a 6year old, I went to the doctor with suspicion of me miscarrying. Turns out I was about 7weeks along and not miscarrying. Excitement turned to sadness when the doctor informed me the fetus had implanted in my cervix and was not a viable pregnancy. I received the methotrexate injection in hopes my body would miscarry but the Medicine did nothing. Now at 8 weeks I'm undergoing a procedure tomorrow for the methotrexate to be injected directly into the fetus. Anyone else out there undergo any if this? I'm scared beyond belief that this could effect my overall fertility