Nexplon out, started metformin, no cycle :/

T
Howdy!! 
So I had my nexplon taken out June 23rd and the doc also told me the same day that I had PCOS and started me on metformin...well I haven't had a cycle.. Is this normal? Should I be worried? Does it normally take a while to get your cycle back? Any Info will help. I go to the doc for a follow up on Monday! 
TIA (thanks in advance) 
Xoxo 

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