I am sorry you are experiencing pain! What stage were you diagnosed at and did they tell you your tumor size?
If you are concerned, I would try and call your doctor or schedule an appointment to be checked on. It is extremely unlikely that your tumor is suddenly growing at a rapid rate, it is possible that your body is just now having a reaction to the tumor.
For me, I experienced no pain until I did my pap smear that diagnosed me. I assume that my cervix was likely not bothered until that test. Then it got a bit worse after my coloscopy. My tumor was about 3cmx3cm and I experienced some discomfort when I was in a big need of using the restroom, pee or poop. This was likely because my cervix was irritated and inflamed after the pap and coloscopy, which is why I experienced no pain and then suddenly some pain.
It is possible that you are also just now “aware” of the tumor so you are more concerned with discomfort in that area than you may have been before. I don’t mean that you are making the discomfort up, but once a person is aware of a tumor it can cause your attention to the area to be heightened.
If you are experiencing pain, definitely reach out to your doctor.