Is it normal that no matter what i do, i still need more?

yes.

To explain, it is coming back because you are suppressing it. The moment you can accept it, it will be there but not as strong and more comfortable.
Also physically, the human body can take so much, you cannot cum constantly for 48 hours straight, you need to find what your limit is.

Another possible suggestion, is to deal with whatever is giving you anxiety. This may not be relative to your situation, but I do it more when I'm anxious to take my mind off whatever is making me nervous.

Once you have done this, you probably will still have an active sex drive, if you'd like to reduce even further I'd suggest that if you are using a toy you instead just rub your clit using your fingers. Also location is a great way to limit, so for example if you usually do it in your bed, you set a rule that is never in your bed. This way you still are allowing yourself unlimited masturbation, but will probably do it less due to the added inconvenience of needing to do it in another location.

Of all of these, I would stress accepting your temptations the most, all of us even if we weren't raised religious have some negativity around sexuality and particularly masturbation in our psyche just because of our culture. However it isn't that difficult with some focused thinking to adjust to the thought that it is totally ok. If you can do this particularly right before masturbating you can reclaim it as an activity you actually enjoy like anything non-sexual. This will be the most lasting, hope this helps