Hello, I am 24 weeks pg and have carried on with a little running/swimming/yoga ok til last week, when a little twinge in my lower back seemed to flare up. It now hurts up my right hip and into my lower back whenever I take a step. It does feel like there's a knot there so is this just an isolated issue do you think? SPD sounds a bit more, but I thought it might be an early sign. Voices of experience please let me know how it sounds to you! Thanks.