All can cause white patches or even
ulcers in mouth. Take a multivitamin pill with B complex
and iron
and see if it helps. You can also take antacids and Omeprazole if you have reflux. Since you are having bruising, it can become serious, and hence talk to your treating doctor about dose adjustment.
Please consult your PCP for primary examination of mouth and treatment regarding stomatitis, deficiencies and reflux. Please do not self medicate.
Hope this helps.