Really not enjoying pregnancy 2nd time around...

Sounds selfish... 
I'm pregnant with baby number 2, having a much better pregnancy... Hardly any sickness I feel fine (last time I was very poorly) 
But I can't wait till it's all over and I've got the baby here ? I just want to get back in my old clothes start jogging again and get back into my diet! I got so slim! I haven't gained much weight only around 6lbs and I'm 18 weeks pregnant! 
I feel like such an awful person.