morning sickness

Hey everyone. I'm currently 7 weeks pregnant and I've been nauseous since I found out at 4 weeks. It's been non stop, not a lot of vomiting but the nausea is 24/7. I need some relief. 
I've tried crackers, ginger ale, eating before I get out of bed, small meals throughout the day but no relief. I'm trying to figure out how I'm going to go another 6-7 weeks feeling like this. 
Looking for advice, tips, etc. that I can try to hopefully feel better. I am a teacher with another week of school left and I just don't know how I'm going to make it. Thanks everyone!