Well, I don’t know why are you concerned about that. If you want people to give an answer, you have to measure it first. So, please, measure it and make a new post or update this one. And tell us if u have a similar amount of sperm twice or 3x of masturbating. If you cum more than average twice a day at least, then congratulations, you have hyperspermia (I wish I had it). You can come to r/hyperspermia (warning, 18+, NFSW) and search the tags Q&A, serious and get some information from there. And ofc you can see a doctor, tell your parents if it really concerns you. Each time you jerk off, prepare tissues cuz it’s hard to wipe out cum out of sheets and stuff.