Ay napakaganda ng discovery mo! Totoo talaga na iron + folic acid together can be a lot for the tummy, lalo na kung sensitive ka sa prenatal vitamins, honestly a few of us moms went through the same nausea phase kaya super helpful na nag-share ka ng timing trick mo, spacing them out makes such a difference talaga. Your point about vitamin interactions is spot on din, parang it's really worth researching which ones can be taken together versus which ones need hours apart, kasi wala sense na mag-invest sa expensive vitamins kung hindi natin ma-absorb properly. Don't stress about the extra Obimin Plus though, you can always use it once you get to the spacing system or maybe donate to someone na pwede gamitin, at least natutunan mo na what works best for your body which is priceless during pregnancy!