It is always most upsetting to women as young as you to suffer significant damage with childbirth; know that you are not alone. Many women have significant damage from childbirth but are embarrassed to speak about the symptoms; you have taken a great first step in seeking help.
It is unfortunate that your ob/gyn is so insensitive; this attitude infuriates me and I'm sorry to say I hear it frequently. You are right, it IS a big deal; all women want is to feel normal again. Do not feel "gross" about your symptoms, there are over 3 million women in the US with pelvic organ prolapse, the good news is you want to do something to help yourself.
First step is to read this article about pelvic organ prolapse so you understand it better, there are 5 types of POP and once you read the article you can send me more details about your symptoms and I'll do my best to guide you.
http://www.medhelp.org/health_pages/Womens-Health/Taking-Pelvic-Organ-Prolapse-Out-of-the-Closet/show/1148?cid=591
Based on what you are indicating, you may have a cystocele (bladder drop). You may be able to utilize treatments to improve it. There are exercise programs you can use to help yourself. Are you famililar with Kegels? They can be of benefit too but must be done properly. The lack of sensation is likely due to nerve damage sustained in the 2nd stage of labor and having that many stitches indicates potential scar tissue as well-something myofascial release therapy may help with. Unfortunatly I don't think this will be covered by Medicaid.
Do you have access to a physician list with Medicaid? Rather than discuss this with your gyn, it would be great if you could see a urogynecologist, the specialist for pelvic floor disorders. If that is not possible, if you can get your gyn to refer you to a physical therapist, they are extremely helpful in guiding you with treatments they start off showing you and you end up doing at home. The physical therapist should be a pelvic floor specialist so you get the right treatments.
Also is it possible to see a different gynecologist if you can't access a urogyn?
Once I get a bit more info from you I'll do my best to help you find a way to help yourself, hang in there!
Sher