Hey same here, I take Omega 3's, but I am also sure there is Vitamin E in my supplement. Never had an issue, the only one supplement I have to watch out for is Magnesium when it comes to stomach upset...
Have you been on any antibiotics lately? Reason why I ask, is I went thru a hell of a time w/my stomach, and it took me a while to realize that my issues got worse after they had put me on the Z-pack. Took me like 2 or 3 months to figure it out...
For about a month now I have been taking Probiotics and a digestive enzyme (am/pm); and I believe it has help me tremendously. I was up to 2 Zantac per day, haven't had one in about 3 weeks now. I had acid so bad that I had blisters on the inside of my lips.... And let's just say going to the bathroom is a much better experience. Also make sure you are getting some fiber in your diet. I eats plenty of fruits and veggies...
Do you drink coffee? If so cut back, at least until your stomach settles down. Watch your caffeine intake for a while...
Well just some suggestions, what has helped for me. I use to be the walking gas company, but not so much any more....LOL
Best of luck.... and perhaps try switching to an Omega 3 instead of the Vitamin E, wouldn't hurt... Everyone's body is unique...
Feel better, sending blessings your way...