Pictures! When to get them done?

Dee🤓 • Had my boy Dec. 16th 2015 after having three miscarriages. Now I am pregnant again, after another miscarriage, so hopefully this one sticks. Due October 16th!
I took a pic yesterday, just on a timer and when I saw it I thought, "I think it's time to get some professional ones done!" But when is a good time? Any ideas? When did you get yours done? Also, any ideas on what poses or how are welcome and if you could post some of yours, that'd be great! Needing ideas.