Mommy, I'd really say go to your OB soon just to be sure, cramping with discharge in pregnancy needs a proper check-up, kahit paano.
That said, some light cramping with discharge can happen, especially early pregnancy, pero since it's making you worried, better get checked lang para mapakali ang isip mo at makita kung lahat ay okay sa baby. Hindi risky ang clinic visit, and it's worth the peace of mind. Sana mabilis lang ang appointment mo, sis!