Well, if you want to ride it before getting it properly fixed my recommendation would be (if you can) turn the mixture screw back in to the original setting (assuming you gently seated it first and counted the turns?) before backing it out. That puts you back to square one until you can get a new one and get the bad one out. Try soaking it in WD-40 to help loosen it. Soak it good and seal the hole to keep the fluid in, then try again....
Good luck