Twisted right knee turning around in bed. i felt extreme pain on the medial side of the knee could this be the meniscus? it felt like it was tearing

Twisting motion: followed by injury to the knee likely points to meniscal injuries. Though it is hard to really damage the cartilage in your knee (meniscus) with such a non-weight bearing motion while supine, unless you have had prior injury and only exacerbated it. You should see an experienced healthcare provider who can examine and diagnose you appropriately.