Horse supplement pills vs. supplement noob

I am trying to learn about supplement pills. I cannot seem to swallow all the horse sized pills that contain all the supplements. Even my half sized Centrum Silver makes me gag to the point that I am afraid that I will inhale the half pill. I feel like a walking pill bag when I am consuming no less than 6 pills per meal. I am open to suggestions including caloric shakes. My nutrition challenges are calcium, potassium, and general nutrients. My current pill take is 6 Natures Purest Bone Factors, 1 Centrum Silver for women, 1 iron, 1 Vitamin E ,2 Fish oil, I take them over the course of breakfast and lunch. There must be a better way.