Loose Bridge

Hi, I have recently had a bridge put in on the top of my mouth. The bridge is pretty big and covers 6 missing teeth. Three in the front of the mouth and there are others missing on the sides. The two very back molars are there. I had an accident when I was about 19 where three of my front teeth were knocked out. At the time implants were not an option due to cost. They put a Maryland bridge in for a few years and then a permeant one when I was 22 or 23. The bridge lasted about 12 years or so. When it finally broke and had to be re done a few of my other teeth had decayed pretty badly. At the time I started seeing a dentist with hopes of getting implants. However, the guy I went to see, dragged it on for years. Scans, Bone Graphs, teeth being pulled, etc. So for a few years I had nothing but a flipper in my mouth. I finally moved out of the area and went to a dentist in Boston. I couldn't take the Flipper anymore. The dentist assured me that there were enough teeth on the top to support a fixed bridge. He made me a temporary that day in his office....."Not sure why the other guy didn't make me one of those instead of the flipper?" and I went through the steps, Bio temps, and then a porcelain bridge. I had received a few different opinions from different dentists as too wether a bridge would work for the amount of teeth that were missing. My choices were kind of limited. As one prostadontist said he could pull out the remaining teeth and do a fixed implanted bridge with 4 or 6 implants. However, the cost was astronomical. The dentist I found in Boston assured me that a bridge would work fine and as long as I took care of it it would last me a very long time. So, I had the Permeant Bridge put in. tHIS WAS Approximately 2 years ago when it was finally cemented. I had moved out of Boston right after. A few months ago I went in for a cleaning. The dentist said one of the molars that had a crown on it had a pretty large gap between the crown and the gum. Sure enough a month latter I noticed the bridge was a little loose. I flew back to Boston and the original dentist cut that crown off and cemented a temp on it. That seemed to stabilize it. He had it sent out and its back in Boston waiting for me to go have it put on. However, I have noticed in the last couple days that the other side is now loose. not the side where he put cut off the part of the bridge and replaced it. Now the other side is loose. I need to go Back to Boston and have something done. The dentist has offered to re do it at no charge. That means at least 3 trips back and forth to Boston. I can't afford to start over because I still have 4 years to pay off the 12,000 dollars the bridge and all the work cost me. Do you have any suggestions? I am scared to death that I am making the equivalent to a car payment every month for this bridge, I can't afford to get implants put in now, and I am asking for any suggestions please ! If he cuts it off and re does it will that fix things? Are there any other ways to make a bridge stronger? Is there a very low cost way to maybe implant one or two posts to help stabilize a new bridge? As I said money is extremely tight and i THINK i have all of 1500 bucks of Dental insurance. I am just wondering if anyone has any suggestions before he re does the whole thing. Thank you so much for any advice. Male 38 Years Old