Is this a prolapse?

Hi! I've been having issues for like a year now and every month I start to hurt in my vagina and this shows up. It is usually there for a few days and then it leaks like green/yellow watery discharge and then goes away. I'm 18 and I have no kids. I went to the doctor for it like last month, but she looked at me when it had already gone away again and said there was nothing wrong. I can't go to the gyno because me and my mom are on medicaid and gynocologists don't take it in my state :/. It really hurts and it's super annoying :(, it kind of looks like a prolapse to me but I'm not sure. If anyone can give me any advice I'd be very grateful!!

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Are you sexually active or have you been sexually active? That green/yellow discharge sounds like an infection and you need swabbing to find out whats going on so that you can be given proper medication. Can you find an STI clinic ? They should be able to help you. If you didnt mention the discharge to your doctor go back and tell her about it.