Pain in crowned front root cannal?

I'm a 23 year old. Girl that went over seas coetic dental I walked out with all my teeth crowned now to top it off I have had alot pain and headaches and muscles spasms to alot of the top teeth even a front root cannal I had dentist check them over they say there fine but I'm in so much pain what could it be I'm going to try get into another dentist tomorrow