31 weeks and in pain

Tomorrow I will be 31 weeks (due Sept 25) and these past weeks have been hard. I have horrible lower back pain, abdominal pain, nausea, and haven't been getting any rest. My hubby works 12hr shifts 5 days a week and he does all he can for me. Lady's help me out I have been drinking a gallon of water 💦 everyday, I try to do baths 🛀 , and I even eat anything with mint 🍃 Help me!!!