Constipation normal at the end?

Samantha • First time mommy due with baby #1 September 2017

After days and days of bubbly stomach I was getting excited that it might be getting close, but now I've been constipated for two days and am worried that it means there's no progress. Is this normal? I'm 37 weeks, not rushing this baby out by any means but looking for any sign I can that he's getting ready 😁