Feeling a bruised feeling in cheek, is this the tooth nerve dying?

In November 2024 I had two fillings on two teeth. I was in terrible pain with one of them and got it root canaled a month later due to shooting nerve pain. The tooth next to it also had a filling and since November was sensitive to coffee and tea. It wouldn't hurt really only when stimulus was put on it.

Fast forward to march 2025 and the tooth next to root canal went nuts when I went back on birth control. I went off again because it was so bad and now have a dull bruised feeling in my cheek even though it's better. I don't feel any throbbing but the cheek feeling is annoying. Please tell me what you think.

I had an xray and dentist said filling looked good and nothing on xray but I have my doubts