Severe nausea and back pain 33 weeks

Jamee • 27. Married to the love of my life. Three amazing beautiful blessed children and one on the way due in June 2015.
All of a sudden after almost no sickness this pregnancy I woke up this morning around 2 with the worst nausea, can't lay down, can't sit up, standing makes me dry heave. Last night before bed I had to be on all fours because of back pain and right side abdominal pain, it hurt so bad that I could form complete sentences (still have the back pain but the abdominal pain has lessened some). I know it can't be gallbladder (don't have one) and I know it wasn't something as simple as gas, I've done everything to relieve an issue like that. Is anyone else dealing with this? Any remedies to help? I have two young children at home and just sleeping it off isn't an option, haven't experienced this before. Help?