orgasms?

im 13, and i masturbate (hence why im here obviously lmao) it’s extremely rare that i will finger myself, as it’s usually uncomfortable since i have only done it a couple of times. i typically only rub my clit. when i do this i feel a little bit of pleasure and then after a few minutes i’ll feel this huge wave of pleasure come in at once; however, it only lasts for 6-7 seconds and then i can’t get that feeling back because then my clit feels weird. i dont know if this is me orgasming or not. HELP!! (if you actually read this thank you bless)