Sensitive teeth

Hello everyone,I got braces about 3 months ago on both my top and bottom teeth,as most of us have here our lower incisors are probably weak or sensitive,my Ortho has put the braces extra tight as I need my canine extracted due to a cavity,every single day since the three months have started my lower incisors have been very sensitive being not to painful to cry about but not to mild to ignore it's been driving me insane,I've already tried taking painkillers but that doesn't always work since even after they are done they hurt and I can't keep buying painkillers, please help me