Welcome to pregnancy! Cngratulations - you have heartburn!
Of course check with your Dr., But this was a terrible problem for me with my daughter and I took Tums, Pepcid, and Zantac. My Dr. actually gave me a script for Zantac since the OTC didn't work. She said no to Nexium, which worked well for me before I was pregnant. Mine was at it's worst from 6 wks to 3.5 months, so hopefully yours is nearing the end.
But, watch out for tomato-based pasta sauces, coffee, barbeque sauce, etc. towards the end of your pregnancy, I got it back whenever I'd "indulge" on something not bland. I also had the gagging with I was pregnant with my son. Drove me nuts - especially when I tried to brush my teeth. It also passed about 4 months in. I used Listerine first thing in the AM instead of brushing right away. Then, after I ate and my stomach settled, I brushed.
Also, get some Saltines and put them by/in your nightstand and BEFORE you even sit up in the morning, eat 1-2. This helped me so much. I also ate them throughout the day because at times, even water gave me heartburn!