Feeling sick at 34 weeks pregnant

Hey everyone, hubby and I went to s wedding today, and came back home right after dinner as I wasn't feeling too good and got a shoulder pain. I went straight to bed and the pain in my belly started like an hour after, along with vomiting. The shoulder pain is gone, and so is the vomiting but the pain in my belly still there, the only position it doesn't hurt is laying on my back, but if I start 3 to long, my back starts to be in pain also😩 what should I do? I really wanna sleep😭

UPDATE*** thank you for your comments. Ended up puking a couple more times, and then I was so tired ended up falling a sleep. I woke up with a very bad heartburn, and cramping, so I will be talking to my midwife today!.