Josh, anyone sending your info to a credit collection agency has to keep good records. Fraudulent companies will take advantage of you by sending you bills that are not yours. Use the info Chris (mmrnhmhmnmhmhn) gave you and read up on FCRA, and FDCPA. If a company sent you fraudulent debt, you can sue them. I did, successfully, without hiring an attorney. There is a thread about it here. I can answer questions if you have them.
Call the company on every bill you get. Keep a file/folder of all bills that come in, separated by creditor and date. Keep sticky notes on the front of each so you can take notes (legit/questionable/etc.).
Medical companies have high rates to bill high prices to insurance companies. If you call billing and tell them you can't afford the high payments, they WILL lower your bill. The first time I called about my daughter's dislocated elbow, they reduced our bill by 25%, without question. You can probably pay even less. Just ask, and don't feel guilty. Your debt is a drop in the collective bucket.
Lexington Law is 100% legit for bad credit reports. I used Dana Facemeyer and took my credit score from 609 to 785 in 6 months. It takes a few months before it gets rolling (the credit reporting agencies are opposed to removal) but once things start coming off, they come off quick. My friend (who recommended the agency I used) had a bankruptcy and car repossession removed. Pretty astounding, as that isn't supposed to happen. Bankruptcies are usually permanent until the 7 years is up.
If you want to know more about my extensive experience in any of these areas, feel free to call/PM me or ask here. That goes for anyone.