How long can a Soolantra purge last?

I have Rosacea type 2. I started Soolantra a little bit longer than 6 weeks ago. After a week my skin looked a lot better but than it started to worsen again. My nose has a lot of little white heads and my forehead has texture that worsens after a shower. My cheeks have a lot of little red dots. Anyone having the same experience? I don't know if my pores are getting clogged or that de demodex mites are dying? Can someone help?