fish oil/multivitamin and nausea

It never used to bother me. I buy the kind with enteric coating that is supposed to help with aftertaste, etc. and could take it any time of day. Now I have to take it at night and hope I get to sleep before the feeling comes over me. Does anyone have more luck with the Krill oil or a certain brand that seems to be better for you? I'm having the same trouble with a multivitamin I've taken forever with no problems for years. All of a sudden it upsets my stomach. Any ideas?