Hi. Well, you've been contagious for a bit with the cold (probably the day before you had symptoms until now and a few days from here). Colds usually last about a week and are a virus. Coughs can linger longer after the cold. Blood is very common when we have a cold as the nasal passages are irritated. My sons and I often have blood during colds. The green/yellow snot is more indicative of a secondary infection as that could be a sign of pus in the mucous. We have a virus first (contagious) and that can turn into a secondary infection (not contagious--- this is where pathogens of some sort grow and cause infection---- sinusitis, otitis media (ear infection), bronchitis, pnemonia). Usually you are much more sick if you get an infection----- fever is often present, body aches, etc.
Myself and my kids can get a thick nasal discharge at the tail end of a cold. What you are experiencing could be that or the signs of a secondary infection. If it persists, see your doctor to see if you need antibiotics.
I'd double your fluid intake and take musicex to keep the 'stuff' moving easily. good luck
sounds like a very bad sinus infection to me, go see your Dr. asap! :-)