So nauseous and back hurts

Ash
Hey ladies! I'm 6 weeks and 2 days. Been super nauseous and my back has been killing me the last two days. Me and my hubby did a weekend in Boston and we did a lot of walking so I'm thinking that's why my back hurts, but also wonder if it's stuff being stretched out. I was On winter break from teaching last week and it was so nice as I have been tired and nauseous. Really not looking forward to going back to work tomorrow!!!