sounds like a very bad sinus infection to me, go see your Dr. asap! :-)
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