Thanks for your query, I have gone through your query. The pain in the tooth taken as support can be because of two reasons. The first reason can be because of high points in the bridge that create excessive pressure over the tooth and result in pain. The second cause can be because of the pulpal involvement during crown cutting. If it is a high point get the high point reduced by consulting a dental surgeon. If it is a pulpally involved tooth then get the tooth restore with RCT and the bridge has to be repeated. Regarding your financial issue, I can suggest you to go to a educational dental institute where you can the treatment in nominal price. I hope my answer will help you, take care.