Lamotrigine rash?

I've had a sore throat for a little over a week and now I have a face rash. I just upped my lamotrigine does from 25mg in the morning and 25mg at night to 50mg in the morning and 50mg at night. I started around mid January. Could it be something else? Can I just take an antihistamine and stop taking the pills or do I actually have to go to the hospital? I have a psychiatrist appointment tomorrow. Pics will be in comments