I'm 7 weeks post-op with no issues until couple days ago started getting nausea after eating and waking up at night with it also !!

I'm just over a year post op. Nausea has been a problem since day 1. You will find it is caused by mostly trapped wind in the early days and also lack of energy. I found sipping a warm cup of tea and sucking mints and moving about helped me . Now it is mostly caused by eating too quickly. The best advice I can give is try your very best to learn new eating habits. Drink as much as you can slowly and constantly during the day. And eat slowly and chew everything into a pulp before swallowing. If you are waking feeling sick get up move about and make yourself a warm drink it helps. Then get back into bed.
I year out and I've lost 7 stone. Even with all the odd issues I've had along the way. This op has given me control and my life back. I can now eat a bowl of cereal for breakfast . A small sandwich for lunch and a small meal for tea. I can eat most things. I year out and it's about making healthy choices. If I don't I simply gain weight.
I wish you all the best. It's not easy but worth every bit of effort you use to make changes.

Thanks for the info ...