baby moving????

I'm 20 weeks and 3 days pregnant I'm also a first time mom but I around 18 weeks I started feeling flutters (more like bubbles in my stomach) here and there and now I feel it all the time usually at night time I'm just wondering do you guys think that I'm feeling the baby some people say it's too early and some people say it is the baby I don't really know and I'm curious because it's such a cool but weird feeling