I have a bump right under my chin that hurts when I put pressure on it what do you think it is?

Bump. Could be a skin cyst, sebaceous gland or lymph node. You should check it out with your PCP.
May be anything. This can be anything from a benign cyst to a lymph node to a swollen salivary gland to.... "sky is the limit". If it's been bothering you for a while and/or getting worse, i suggest in office evaluation.