It could be a mixture of both. But you would know as a mother if its your baby or gas. Either way congrats
it could be your baby you are feeling, thats exactly how i started feeling my baby, like little gas bubbles, but i know that i don't get gas bubbles 25 times a day,so that was my que that maybe what i was feeling was my baby, sure enough by 2 weeks later i was more than sure it had been her.