Hi! Normal lang yan at common sa pregnancy, lalo na around second trimester when everything is stretching and shifting, a few of us from my mums' group experienced the same around that time. But since you're having back pain din with it, I'd really suggest checking with your OB just to make sure everything's okay and it's not something else, especially since you're almost 14 weeks na. Basta rest lang, wear comfortable shoes, and try not to lift heavy stuff muna habang hinihintay your appointment!