Does Methocarbam Interact With Trazadone And Lorazepam?

I have been prescribed methocarbam 750mg as a muscle relaxer for my neck. I have had 2 cervical, 2 spinal surgeries, fell and broke my neck at C2 and am facing a triple hernia surgery repair on June 6, and then we will move forward with the most serious surgery where they are installing a rod from S1 to T3. My neck goes into spasms and the muscle relaxer helps. The thing I am concerned about is that I take 75mg of trazadone at night and sometimes I take a 1/4 tablet of lorazapam. So, adding methocarbam scares me , so I make sure I take that way before the trazadone and lorazapam. Is that ok?