What can I do about bladder leakage?

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I'm 24 and have never had this problem before. I'm leaking a little bit here and there all throughout the day. I'm going to the bathroom much more frequently than usual, even though I'm not drinking more than usual. I'm going through at least 3-4 pairs of underwear a day. I'm about to go buy more underwear tomorrow because I don't have enough for this and I can't keep up with washing them this much. Or at least get some pads to wear all day. I have started to get a rash because of it. I'm even bleeding a little bit from wiping the rash.

I have no clue where this came from. It just started a few days ago, maybe closer to a week ago, and this has never happened before. What could be causing it? What can I do about it?