The first thing I want to say is this: There is nothing wrong with you!!! Getting wet between your legs is a perfectly natural and normal response to sexual arousal.
I think that your feeling of annoyance is due to frustration with your situation. I'm assuming that your sex life is restricted to self pleasuring, rather than with a partner, and as a normal healthy woman, you really need a relationship that can provide you with a satisfactory outlet for your sexual urges; or failing that, masturbation is your best solution
What to do about this situation? Assuming you are not having a satisfying sex life, I can only suggest that you masturbate as frequently as you like. You don't need to ration your orgasms, we aren't given a limit to the number of orgasms we will have in our lifetime, so go ahead and find ways to enjoy the pleasures of your own body as frequently as you want. Literally, use your imagination!!! You can safely fantasise about whatever sexual scenario excites oh the most. There's nothing bad about this, as it's all in your head; the dreams and images your brain can create to excite you can be whatever you need to bring ultimate pleasure for yourself.
If you are in a sexual relationship, I suggest you need to get your partner to do more to satisfy you. Perhaps your sex life has got stale and not very exciting? If this is the case, you need to decide whether the relationship can be reinvigorated, or needs to be ended. You are entitled to enjoy sex, and if a partner isn't fulfilling your needs, things have to change!!!
Let me reiterate: there's nothing wrong with you, so please don't worry. All of us have those same feelings, sometimes at the wrong moments, which can feel embarrassing, frustrating, and annoying. I still masturbate frequently, even though my sex life is extremely satisfying; I just don't see why I should deny myself pleasure when I feel like it, and my partners aren't around at he time. So, when you feel like it, as the Nike advert says..... "Just do it!!!"