Hard time accepting

I was wondering if anyone has felt like this and what was the out come.

I was so excited to be pregnant... For the first 3 days. Since then I just keep thinking how hard things are gonna be. I feel like like my life has just stopped now. I'm not coping well. I'm not bonding with the baby. I'm happy if I pretend I'm not pregnant /: which is quite hard. I'm not 16 weeks and 3 days. I hAve  just become more depressed and anxious. I've heard this is quite normal, freaking out and having negative thoughts Etc etc.. 

Was hoping someone could give me some advice or if you've heard of a similar story that turned out positive. 

Thanks