Pre-baby Blues? Is this normal?

Jinna • Mom of 1
I've been feeling major sadness lately and it's not getting better. 
We're told to inform our obgyn if we have sudden changes in moods and thoughts but I keep postponing it because I feel like it's just my hormones. 
I don't feel like doing anything anymore. I don't have motivation. Thinking about having a baby is giving me anxiety. I feel so insecure. I just wanna cry and cry all day. I can't focus on anything. I want to quit my job. 
It's hard to explain this because I love the life I'm carrying inside. I truly do and I wouldn't trade this experience for anything else in the world. I know I'm blessed and beyond grateful I can be a mother. But if I can go back to the day it happened, I would've used protection. I don't feel ready to be a mother. It's killing me cause I feel like I won't do a good job. I feel like I won't be able to give her all and more. I want the very best for her. 
I'm afraid this will turn to baby blues or post partum depression :'((((
I'll be 32 weeks on Thursday.