Overall your stats look pretty solid.
Your 3-bet % is probably a little high though, I would probably try and tone this down a bit to 6-7% at most.
Not sure if you can do this in PT3 as I use HEM but try and filter by 3-bet pots and see how much you are winning or losing. If you are winning a lot then disregard my previous advice.
As you said you seem to be losing a lot of money out of the blinds, to fix this what I would do is really narrow down the range of hands you're playing out of the blinds until you get more comfortable playing pots OOP, then slowly start playing more hands until if becomes unprofitable to add any more.
Also try and narrow your cold calling range preflop down a bit. Your VPIP/PFR are currently 20.4/15.9, try and narrow the gap between these to 2-2.5.