I'm abit worried i have this small bubble and some redness almost like a cut in the inside of my cheek. should i be worried ? what should i do?

Sore in mouth: Most sores in the mouth heal in a few days and are harmless. You should seek medical attention if the problem becomes widespread, or keeps recurring.

Dentist or oral surg: Probably a simple, benign bite fibroma.

Get diagnosed: Hi, it’s hard to say without a picture but there is a great app that may be able to help you get a diagnosis without being seen in person by a dermatologist. The app is called VisualDX and is one of the best, if not the best out there. Many clinicians, including myself, use it. Just snap a photo and it gives you a list of possible diagnoses. Good luck!