Sounds like you should stick to NL $100, make your 2K back again, and then try NL $200 again.
Obviously pooring some time into analyzing your losses at NL $200 would be well worth it in the meantime - were they primarily bad beats or bad calls etc.

Congrats on the incredible winnings $50 to $11k in 9 months...embarrassing really lol - I've been at it 6 months and I'm still at about $700 from my $50 starting deposit. But I only 2-3 table NL $10...and I'm likely an overly conservative player.