Excruciating pain!

I've been in excruciating pain for 4 days now. I went to the ER yesterday cause it was to the point I was throwing up from the pain. I wasn't worried about the baby because she was acting completely normal and I'm just really in tune with my body. But I was worried that I might have appendicitis. My appendix looks fine though but they saw a cyst on my right ovary (the side the pain is on) and concluded that it was causing the pain. I was sent home and told to see an OB as soon as possible. I made an appointment with one but it isn't till tomorrow. I am in horrible pain at the moment and I dont think I can go another night without some type of relief. Do you think it would be okay if I took half a norco for the pain? I've heard of some women being prescripted it during pregnancy and I would only take it once. But I don't want to cause any harm to my baby. I just can't go through this pain another moment and I need some help. Also open to other relief options.