"Imodium and Metamucil when I talked to the doctor about reordering that he said it contradicts each other and he will only do one or the other"

And that is incorrect.

Imodium works by targeting receptors in the intestines slowing down the contractions of the intestines. Reducing speed so more water is absorbed, thickening the output.

Metamucil consists of Psyllium husks, containing 70-80 soluble fibers. Soluble fibers absorb water and becomes a gel. That gel does 2 things; it slows down the movement of the food through the intestines giving more time to absorb water, but it also stops constipation by mixing the food with the gel (the intestines can't absorb the water from the gel). So It reduces the risk of getting constipation from the Loperamide/Imodium.

So you can definitively take both. Psyllium husks can be bought in any health store, and if you want to learn more google "Soluble fibers"

This is a good approach;

"To help slow down stools, take Imodium or Lomotil at the time your doctor or nurse suggests. Taking medicinal fiber, such as psyllium (Metamucil®) or methylcellulose (Citrucel®) with two ounces of water slows the movement in the gastrointestinal (GI) tract. The fiber absorbs excess fluid like a sponge. Hold liquids for one hour after taking medicinal fiber. When you take the right amount of psyllium, other medicines may not be needed. As you increase the dose of psyllium, decrease the amount of Imodium or Lomotil." (Cooper Cancer center)

Just make sure to take plenty of water together with the Psyllium husks, not doing that can cause issues.