Sir I Am 31 Year Single Male. My Weight Is

Sir I am 31 year single male. My weight is 54 and height is 5.6. Sir I have problems regarding my sex life. Sir, I have good endowment manhood. But when I enter in vagina I just feel like I am coming , and just after 3 or 4 thrust I ejaculate. And my second question is that I am not doing sex without protection from last 8 or 9 year but last time 3 days ago I have done unprotected sex with one married woman. We do it 3 tims in 1.30 hours, but after first one when we try for second I feel like my cock is burning and this happens first time and also I feel like I have little bit pee in every minutes.
So my question is how I can increase my penetration time, and what is the reason for my cock is burning?