"1) I can never remember TO take them."
I have a box that's divided up into compartments for each day of the week. Once a week I fill it up with whatever supplements I'm taking and I have it out on the counter where I see it every morning. It's a habit now to open the correct day of the week and take what I need.

"3) They upset my stomach a lot"
It probably means you should take them with a meal.

"4) I constantly have to explain to people what I'm taking and why"
Why? I don't mean to be ignorant but this seems like your business. Why do you feel you have to explain it to anyone else?

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Anemia is nasty. Hopefully it will get better on a low carb diet but if not you should probably supplement.