Should I chop my hair off?

So... 22 weeks pregnant on Friday with #2. I just started a new job working in a lab as a phlebotomist. I have thinner long hair and I feel so blah just pulling it up in a ponytail. I used to work in an office and could style it however, usually curled. I am debating cutting it off....

What it looks like now:

What I'm thinking of doing:

What do you ladies think??