i started with Rainbow before my first doctor appointment and those didn't make me feel gross at all, but then I switched to Nature Made after learning about DHA and it was recommended to take it at night, but it never fails, I constantly wake up with an incredibly upset stomach and it doesn't happen if I skip my vitamin (I tested it). Just wondering what you all take and if you've had luck with yours not upsetting your stomach? I really need a different one.