I have a bump that is very painful when touched or is not touched on my inner gums behind the front bottom teeth it's red and kinda hard squishy.

Infection. This most likely is a abcess or infection. It is important that you get this treated properly. See a dentist asap. This is something that you should not ignore or try to treat yourself. Call a dentist today.
Possible infection. Could be from a non-vital nerve or a periodontal pocket. You need a local dentist to examine it and evaluate it and recommend treatment. Please call for an appointment.