Hi. I'm online and happy to answer your question today. I have to step away from my computer for a little bit but I shall return soon!
Hi. No, mucus is not a bad thing. It is usually from a dry eye issue or allergies.
A tinge of blood once in a while is also not anything to worry about as it can come from a plugged up meibomian gland that opens up and cleans itself out etc.
None of these issues should be of concern when it comes to the surgery you are going to have.
I see that you are typing and that could mean a couple of things: 1. you are actually typing or, 2, the chat system has frozen up. I'll give it a few more minutes and if I've not seen anything from you I'll switch over to the Q&A system. That system works a lot like 'text messaging' but, unlike the chat system, it almost never freezes up. We can continue to work on your question there. :o)