I'm pretty confident you're going through it too. I had many of the symptoms you did.. chest congestion, high fevers, night sweats and chills, massive headaches. The worst symptom I had was joint pain for some reason. At the time I remember joking that even my hair hurt. I was either in bed or on the couch for nearly 3 weeks, eating bland foods and taking various pain and decongestant meds. It's worth noting that the meds seemed to have very little effect on what their intended use was. The headaches, joint aches and congestion seemed to be barely impacted by what I took. That was essentially my experience. Symptoms went away gradually at first, and then abruptly disappeared altogether.
