Hi there
B3 is not the end of your application this year. What is your actual UCAT score. What about Plymouth dental school. I do not know your GCSE. If good, you can apply to Belfast dental school. If and only if there are no interviews, then work very hard in Year 13 to get as many A* as possible. Doing the UCAT again will be much easier . If you get yourself good job during the gap year such as supermarket etc and earn good money you can your family with bill and or not being a financial burden on them. So, getting A*, high UCAT, and a job will lift your morals and that of your family. During the gap year, you can learn to cook with your family and go to the gym to get fit.