I struggle some with acid issues. One of the things that helped most is sleeping propped up. I went home through my first few days of surgery and slept on my parent's reclining sofa, which was a huge help since I could lay back some and use my legs and arms rather than abs to pull me up. I added tums to my routine (2000 mg 2x per day, the 2 of the 1000 mg tums of which you can take 7 in a day). Also I found the Zofran I was prescribed for nausea often helps with acid.
I'm now 6 weeks post op, and have found sleeping propped up with several pillows to help with sleep. Also, hydration helps too! I have found my acid is worse after introducing new foods, and has gotten better the further out from surgery I've gotten. I hope your recovery is going well and you're acid problems get better over time!