I think my puppy bit me on the lip but I didn't think anything of it. I had a little blister on my lower lip last night and I woke up this morning and my lower lip is swollen, the blister has burst but I have another blister on the upper and inside of my lip. I think I may have burnt my lip when I was cooking tea last night, but my lip is really sore and feels full of fluid. I went to the chemist who gave me zovirax but I am 28 and have never had a cold sore nor been in contact with anyone who has. If it's not a cold sore and I use zovirax could it make it worse?

Ive also had a toothache and ulcers on my gum for a few days...