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PLEASE ANSWER. Maternity pictures soon.

Ok so I have been having sciatic nerves in both of my legs. I have extreme fatigue and have to urinate quite often. I'm 28 weeks, I'll be 29 weeks tomorrow. Is this a sign my baby girl is growing? I'm only asking cause I have maternity photo shoots coming up. When do you guys think she will make my stomach pop out? This was my stomach yesterday!!