Teething Help!

My daughter is 15 months old and I believe that she is cutting her molars. Her upper left gum is completely swollen and she has been suffering on and off for almost a month. Each tooth she cuts take a long time to come through. Her nose is runny (on the right side only). She is very irritable and restless. She wakes up 20+ times at night crying and screaming. Sometimes she stays up for and hour or two in the middle of the night-playing or crying or nursing. She is constantly nursing throughout the night. During the day she is better but still irritable. She has always been a light sleeper-has never 'slept through the night' or longer than about 4 hours at a time. She was slow to start solids (12+ months). These past few days she isn't really interested in solids at all. Any recommendations? We have been using the multi-teething drops by boiron. I have the 30x household kit from hyland's as well.