I think the important question is... have these suicidal thoughts been more frequent as of late? If the answer is yes, it really might be worth bringing up as it could be a side effect of one of the medications or early signs of a depressive episode (in my experience). Another question that your doctor would ask is whether you just think about it or truly consider it.

Honestly, it does sound like episodes I go through. I've always considered them to be depression. I think many people associate depression with feeling deep sorrow constantly. Sometimes, though, it can be apathy. Not wanting to do anything, not caring about things, etc. It could be depression, it could be stress?, it might be a number of things.