Really bad cold Sores, soon the pain?

When i am stressed/worn down or poorly I get cold sores and really bad, I've not had them in a while but I have been poorly and got them and I have about 4 on my top lip, I've been to the doctors many times over my life. Anyway untill I can get some more cream is there anything I can do to soothe the pain ? They are stinging and hurting me.. Here's a picture from this morning, it is worse now