I am having problem with my jaw every time i open it it pops and cracks and it hurts really bad and i'm having migranes and pain killers don't help?

Maybe related or not: Jaw problems can relate to the temporomandibular joint (TMJ) which can become dysfunctional or arthritic, though usually in older patients. This can trigger migraines, but you need to have both addressed as the migraines might not be related. There are dental practitioners who specialize in jaw disorders and this would be a place to start. Neurology or pcp evaluating headaches also.