Cumming too fast

So usually whenever I have sex or get oral, I cum super quick. If I'm having sex and it's really good I can cum in like 5 minutes. If I'm getting head, I'll come in like 30 seconds. Usually after I cum from head, I become very sensitive down there and need to recharge for like 20 minutes. (I'm weird, I know) However, if men come quick it's usually a bad thing but I'm a woman! Lol I don't have sex a lot nor do I masterbation which is probably the reason for this but still..... what are some ways that can help me not cum so quickly?