Quickening almost 12 weeks? What did it feel like for you?

Something has just started this week that’s been different, so that’s why I’m thinking baby and not gas. Right where uterus is, I will randomly feel a “rolling sensation”. I suppose similar to a muscle spasm but add the rolling/small pulling. Sometimes like a hard bubble (I’m doing my best to fully describe ladies) It can last for 5 mins and used to only at night when I lay down. Now it’s several times a day. Is this baby? *to note I’m petite and this is my first pregnancy