Sudden drop in Google - backlinks?

Hello,

I have this website www[dot]e-minoxidil[dot]ro and www[dot]girl-
fashion[dot]ro

I've noticed they disappeared from first 100+ results for some main
keywords. Was ranked #10 or lower for them .. that until I chose
someone that promised me some backlinks (I think blogs and some .edu
links in a *pyramid* structure or something). It seemed white hat to
me.

But now, after like 2 months after that my sites dropped drastically.

How can I see what the problem is? How can I repair this mess?

Thank you

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