Acid reflux?

Woke up about an hour after falling asleep to a sour stomach. I took a few tums and switched sleeping sides (swapped to my right) and managed to fall asleep...but here I am a few hours later up again. This time I have a sour taste just at the top of my throat that’s so uncomfortable! So I took some mylanta and it’s maybe helped slightly but I still can’t sleep. It feels like I could throw up too.

Anyone have any other tips? I’ve heard of baking soda but it’s on my “no” list of remedies. I’ve never experienced this really, I have had an upset stomach at night but never the acid in the throat.