So upset with my weight gain

Ally
Hey June moms to be - just need to vent for a minute - I posted recently about when late June mommies are taking their last day or work - so I was going to try to push myself to June 17. I'm due June 27 but the baby is already almost 6 pounds - I know they can be wrong but the doctor is swearing I'm not making it to the 27 - I teach 6th grade math to complete animals so sitting at my desk is not an option and I'm miserable. 
 On top of all of this my doctor only wanted me to gain 20-25 pounds - I wasn't over weight when I got pregnant but I am extremely weight conscious since I struggle with weight gain and grew up over weight - well this morning I stepped on the scale cause I have my 35 week appointment today and I have hit 33 pounds up - 
I'm just so done and I want this whole thing over with and I feel terrible for feeling that way - is anyone else feeling like this?!?!?