Invisalign treatment was finished with composite bonding. Now when brushing my teeth, my gums bleed and ache. Is this normal?

I had Invisaligners and the treatment was finished with composite bonding (assume this is the same as dental bonding) The bonding was added over 3 months ago. Now when brushing my teeth, by gums bleeds and have annoying ache, and sometimes throbbing sensation in my gums. I have been back and forth to my practice but it is still ongoing - surely this is not normal?