My last Chemotherapy was on 08th Jan and at the same time, I came down with a throat infection which has now gone to my chest. I refused to go to A+E because of a horrendous stay early December, I managed to get my doctor to prescribe antibiotics and I'm finally on the mend, although I still have a terrible upset tummy and nausea. 

The inside of my mouth is so sore, I have spots on my tongue and I have a cold sore on my lip, Is there anything I can use to ease it, to make it more comfortable to eat? Thank you!