Epitheliod Trophoblastic tumors ?

Last year I needed an emergency hysterectomy. I was having serious pain one night and ended up in the ER. The next morning, I was having surgery. I was later told that it was Epitheliod Trophoblastic tumor, a very rare form of cancer. I still have my ovaries and worry that It may come back. I have read that it can also come back in your lungs or anus. My pap was good this year and I had an MRI of my abdomen, but what about the rest of me. How will I no? What are the symtoms? My Drs don't have much info and I was their first and only case. If you have any info or advice that you could share, I would be very grateful.