Nausea every single night!

I was diagnosed with GERD because I have heartburn and I often regurgitate. However, for the past month I have felt like something is stuck in my throat and I am getting nausea every single night. It is so incredibly frustrating. I'm good for most of the day, and then 6-7pm hits and I get nausea. I have to lay down. The only thing that helps is going to sleep.

I am on Nexium and it has done nothing. I still feel the same. Doc just told me to try Prilosec OTC so I started that today. The past few days I've been starting to get nausea in patches throughout the day. For example, today i've had it steady all day, with it getting worse at certain times.

Please help!