What Causes Vomiting Of Yellow Mucus Along With Fever?

I ve been doing mephedrone for like a year n half now had lichen planus a year back no its has become far less I smke weed n cigarette.. Alcohol use to have a lot now reduce to a bear..had protected sex wid sex worker also did HIV test negative.. After DA test a month later had protected sex wud two diff sex workers..n after DAT did mephedrone on weekends like 7 in a row had cold n light fever body pain..after DA drug session..been snorting mephedrone only...had same prblm a week back now its gone but had a yellow mucus have taged pictures.. Also have small rash DAT goes away in a day..not on any medicines..plz help getting married nt able to focus cause of dis worry..