ANSWER:

Iddah is over once you give birth. You can go out when needed as it is not similar to the Iddah of a widow. 

I was officially granted my khula today by the judge. I am 7 months pregnant. When will my iddah finish. And what am I allowed to do during this my iddah. I am a single mom now (son 3 years) and my parents are providing for me and my son from Europe.so i have No mahram. Do i have the same freedom to go out as I want,or only for necessity? What If someone invites me4coffee?