Everyones bodies are totally different.. there's probably not anything wrong with you. Try maybe men's deoderant? I think guys typically sweat more than girls so I think maybe those are stronger? I don't know though. I'm not saying you are part-dude or anything and sweating a lot doesn't make you any less feminine, everyone is just totally different.
I have that same problem, actually, and the only thing that ever worked for me was Certain Dri. It's amazing. You can get it at any drug store. It's a prescription strength deodorant. It says to use it every few days, but I only use it once every few weeks to once a month and it works wonders for me. I hardly sweat at all, whereas my pits used to be soaked after 20 minutes of wearing a shirt. I also wear Arrid Extra Extra Dry daily between Certain Dri days and so far it's the only thing that works.
does your sweat stink?? if not don't worry about it you'll find that most people won't give a damn about you sweating as long you don't stink.
How about if you hire some people to point huge fans at you when you do anything other than sitting down? that way you employ people and no-one will drown in a big pool of sweat Maybe youve got huge wads of armpit hair and thats the problem
talk to your doctor about something like "drysol". It is an alcohol based liquid you put under your arms before you go to bed (can also be put on hands/feet) and i swear, after using that for a week I don't need deodorant for the next few months!