The Back Of My Tongue Has Pretty Large Red Bumps

The back of my tongue has pretty large red bumps and is a kind of whitish yellow color all in the back. I also have a sore throat. I felt myself getting sick a while back, but I thought it went away, but I also have a runny nose. I am very stressed out because of finals right now, and I've been smoking a lot of weed, so I don't know what is causing jt