Baby movement (1st baby)

I am 15 weeks 5 days today. For the last 2 weeks, I think I felt the baby moves. Sometimes move lightly, but then farted LOL then I figured that was gas. But sometimes, it felt constantly at the same spot twitching, then the doctor said the uterus is stretching. Then I felt something brushes inside against my palm when I put my hand on my tummy, just below the belly button, its very light... maybe just my imagination or my wish hahaha but still think that it is the baby moves :p btw, congrats on your pregnancy. Pray our pregnancy goes well ^0^