I don't know what target phrases you're targeting but I suspect you have gone a little overboard in link building...
It maybe just coincidence that your change and your loss in rankings occurred at the same time and could be unrelated to your https change... also you have chained redirects you should fix... you go from http to https to https://www
You also lost 8 do follow links just recently as well...
Your domain is about 10 months or so old and I think you should examine your backlink stragety very carefully. I would stop your link building until you find a resolution to this issue.
( Links can kill a site )
