K.L.
There are several possibilities, including ovarian cysts, ectopic pregnancy, and appendicitis. Your symptoms might also indicate irregularities in the function of the ileocecal valve (connecting the small intenstine to the large intenstine, near the appendix), which is relatively common. Endometriosis is another relatively common possibility. There are other possibilities, but these are among the most common.
I have experienced 3 of the above 5 possibilities. Twice it was ectopic pregnancy (tubal), once it was a diseased ovarian cyst. The pain became severe with each of these incidenses. The pregnancies required surgery. I cured the diseased cyst with non-medical and natural approaches with the help of a very good therapist and a great deal of prayer. That therapist and a good nutritionist also helped me with spasms in the ileocecal valve, which was not as severe a pain, but was an on-again-off-again problem for a long time.
Another possibility that people don't like to think about is that these symptoms could indicate parasites.
If you see a doctor and you are told that they cannot find any cause, you can be pretty sure it is not ectopic pregnancy, a diseased ovary, endometriosis, or appendicitis, which are things they look for specifically and are commonly diagnosed correctly. If they try to tell you there is nothing wrong, ask about spasms of the ileocecal valve or the possibility of parasites. If you feel it is an intenstinal parasite, you might want to read a book by Dr. Hulda R. Clark, The Cure For All Diseases. She probably knows more about parasites and how to get rid of them safely than most doctors do. It has helped me a great deal to learn what I can take care of for myself. It has kept me off prescription meds almost all my life!
So, I suggest you get a diagnosis and try not to worry too much. Life is full of challenges, but it really is a great love story. Love, faith, and my husband's undaunted humor have carried us through many a trial. Let us know how it works out.