Hi there ~
I understand your concerns. It is concerning to know that there is a bump on the tip of your penis but it is also reassuring to know that you have the burning sensation when peeing. It is an indicator of infection and you can easily treat urinary tract infection
with antibiotics. I believe that you need to also maintain proper genital hygiene and use analgesic
medications for the pain till you consult a doctor who can prescribe the appropriate antibiotics after testing your urine and running an STD
profile. I hope you do so as soon as possible.
I hope this helps. Take care and have a lovely day!