Public bone discomfort when pregnant?

I am in the 22 week of my pregnancy and I feel slight discomfort at my pubic bone area (right between both thighs) when changing positions (i.e. standing up, squatting down, getting up from lying down position). I don't really know how to describe the feeling, it is a little painful (but bearable) and it feels as if my below is opening up. Is this a concern? I tried googling and it may be pelvic girdle pain (PGP) or symphysis pubic dysfunction (SPD). Anyone has a similar experience before and can share about it? Should I go to my gynae for this problem?