Please help..

I'm a first time Mom. I gave birth 2 weeks ago today and I am so very blessed to have a beautiful wonderful amazing little girl. I truly don't deserve her. I've been having horrible anxiety about everything. I feel my world is crashing down. My life. Everything I used to know has changed. In my heart I know it's all for the better but my mind keeps taking me to all of this anxiety about it. My husband picked up another full time job and I don't know how to handle it. I'm home alone all day and night with my baby. I resent him and I feel horrible for it. I don't feel I deserve to be this little girls mama..she's too amazing and I shouldn't be missing my old life where I could do whatever and it was so carefree. Is it normal to feel this way? What am I doing wrong?