Good morning!
I, too, had the same issues with prenatals. I started taking them about 5 months into my pregnancy. I have always had stomach problems. I have been diagnosed with spastic colon as well as irritable bowel syndrome. I have a hard time with vitamins, but knew I needed something to help me feel better and more energized.
I tried many different things before I found GARDEN OF LIFE. I highly recommend those products. I have never in my life felt better or more energized. I was very skeptical before I started taking the products, since I had tried so many things before. But I truly noticed a difference in my stomach pains and my energy level after about one month.
I take the probiotic he offers in the morning on an empty stomach and it has NEVER once bothered me. I also take the perfect food supplement he offers. There is also a vitamin for mind and energy that I highly recommend. Between these three supplements, I have never felt better. These are not for people with stomach problems only. Probiotics and the other two supplements I refer to are for anyone to add to their diet.
I take capsule form, but powder form is much better since less is eliminated from the system when taken in powder form. Whichever you choose, I truly hope you look into GARDEN OF LIFE products. He has great vitamin supplements for otherwise healthy people, and I can attest to the fact that they truly work. I am sure you can "google" the name GARDEN OF LIFE and find a provider. I have purchased mine off of the internet in the past. They also have his products at local health food stores.
Good luck to you!