First orgasm at 23

Hi everyone, first post on here! I’m after some information on if something is normal.

I am in a somewhat new relationship and me and this guy were having sex and he was hitting a really sensitive spot I’m 99% sure I finished (this is my first time ever!) when we done I suddenly felt extremely drained and very emotional.

Is this normal as a girl when you finish? Is this because it’s my first time? And will this happen every time?

Thank you in advance!