I have heard this again and again. Some people are fine for a week and get the symptoms again, others like you for 3-4 weeks. A doctor told me that he has seen people symptom-free for a week, get mild symptoms, symptom-free for another week, get mild symptoms, symptom-free for another week, then get HIGH FEVER all of a sudden!
Since this is most likely a man-made virus (yes, I believe that the lab in Wuhan, from where the zero patient came, mistakenly let loose the virus they were manufacturing and manipulating), it is harder to rely on previous patterns of "normal" flu or corona viruses. On the other hand, we also have the "normal" chicken pox that can remain dormant for a lifetime and then wake up in a different from as shingles. Yes, I believe we are in for a ride with this one!