Yes, this is a big problem for some women similar to women who naturally have very large breasts. Since you are having these problems and their degree, you must be pretty long. The only thing that can be done other than trying to manage it as you are is surgery. Like breast reduction surgery, some insurance will cover this if it's deemed necessary. The procedure is called labiaplasty and is mostly done for cosmetic reasons (unhealthy body image IMO). Also like breast reduction, you need to inform yourself and choose a doctor that does the procedure correctly for minimal impact. I saw or read something about a specialist in CA, of course, that had great results from the patient's POV. I'd could go into more detail but it might be TMI.
I hope that this is helpful to you. I'm not trained medically, just want to help.