Dry, Chalky Tongue that has a constant burning sensation for 3 weeks?

My tongue has been feeling AWFUL the past 3 weeks. I brush, floss and use mouthwash daily. So I decided to switch toothpastes and use hydrogen peroxide to rinse with. Well that didn't help. My tongue has white patches sometimes too. I brush my tongue twice a day and sometimes I can't really taste my food. I have read about BMS, burning mouth syndrome... but I don't know if that is what it is. I am going to see my dentist about this soon but was wondering if anyone else has experienced this and how long it lasted? Sometimes I just want to rip my tongue out. I drink CONSTANTLY too. I also have a lump on the inside of my gums in front of tongue on the bottom, I read lots of people have these. Mine has gotten bigger but doesn't hurt unless it's stabbed by food or when they do x rays at the dentist, then it REALLY hurts. Nothing in my diet has changed. I'm almost 36 years old. I've been married for 15 years, can't think of anything new except the toothpaste I was using was new but I changed back to my old toothpaste a week ago and my tongue is still doing the same thing.