It can be brown looking mucous... not necessary blood.... good luck
Mucous plugs can look different in every pregnancy. But if your having something that's clear and watery, it could be amniotic fluid. I would call your doc and ask.
Mine was a clear jelly stringy type blob
Sounds like a normal discharge. As long as it wasn't cottage cheese type. Google some pictures and see if that helps.
They can be a variety of colours (yellow, brown, pink, clear, green, etc.) but they usually look like a big sticky gooey glob of snot.