Do female dogs have yellow discharge before they come on heat the discharge does not smell n she is still her self like she not sick or nothing

Yes, the yellow discharge is normal, and will gradually become stained with blood. You can buy a sort of heavy cloth diaper arrangement that can be washed and used again.

OK so how long until she will start bleeding cause its just the yellow mucas at the moment

OK so how long until she will start bleeding cause its just the yellow mucas at the moment

Do you plan to breed her? Whether or spay her or not you need to know how the process works. I would suggest that you do some research.