Lent is capitalized and refers to the religous pre-Easter season. I do not think it refers to 40 days, in general, and certainly not 40 "work" days.
You cannot aggravate a person. Aggravate means to make worse. You may agitate or irritate them, however.
"Kind of" (or even "Kinda") is conversational (or colloquial, which actualy means conversational, not a derogatory term) English. It means "almost" or it can mean, "it just happened that..."
Coming down with a disease, means catching a desease. The implication is that you took to your sick bed, you came down from your normal active life.