Is your fanny bone (pubic bone) sore when you press on it...if it is then the pain is probably SPD (synthesis pubis dysfunction) and you will get some relief if you see a physio who specialises in ante&postnatal treatment.

If not, it's a good enough excuse to rest when you need to and get right off your feet. Icepacks might help too. I'm feeling the same thing but also have the SPD so if it's not one hurting it's the other. Lucky for us we get a prize at the end !