Hmmm. . .
A couple thoughts had gone through my mind--
I was at first thinking you could have a urinary tract infection
. If you have any similar symptoms to what you had before with the infection, I would have your urine checked again. I was worried that maybe you had developed pyelonephritis-- where the urinary tract infection ascends and gets into the kidney. That would be a deep pain kind of on your back. It can oftentimes be associated with fevers and chills. If your urine is positive for infection, that is something to think about.
Next, it is possible with any surgery to injure surrounding structures such as bowel. I am assuming there were no complications during the surgery, otherwise your doctor would have told you.
It could be possible that you have developed an adhesion on the left side. . .maybe it is even where the port was placed. Sometimes the bowel or omentum or other structures scar down a bit and get stuck in place and can cause pain. Sometimes this can be seen on imagine like MRI or CT scan.
Finally, I would make sure to have your doctor examine your vagina and make sure everything looks ok inside-- sometimes you can have infections there that cause crampy pain.
When you see your doctor and tell him or her these complaints, I would expect that they would do a thorough abdominal exam as well as a urine analysis and speculum exam. If nothing shows up on any of that, he or she may consider doing an imagine study.
Take care! Do know that your body is still healing even though it is 3.5 months out. I know post op pain can be frustrating and what you have described does sound atypical. Please let your doctor know. Please click accept so that I may receive credit for my time. Bonuses and/or feedback are always appreciated. Thanks!