Oo normal yan, mama! A few of us experienced the same thing sa first month, parang cramping or stretching sensation kahit walang morning sickness pa, so don't worry. Pero since pregnancy is different for each person and cramping can mean different things, I'd really suggest mentioning it to your OB just to make sure everything's okay, especially if it gets worse or may unusual discharge. Sa meantime, rest lang and stay hydrated, at let us know how your checkup goes!