The bubbles are considered "flutters" and yes it's your baby moving. I feel flutters and stronger movement as well I'm 19 wks. With my first pregnancy I felt flutters as early as 15 weeks.
its normal for them to behave for some days...for me, i eat something sweet, relax on my back and wait for the acrobatics! Works all the time!
I wanna say like 17-18 weeks...it was right around Christmas. My husband felt her for the first time New Year's Eve but then didn't feel her again until last week.
I'm 18+4 now, how far along were you when you first felt it?? x
How many weeks are you? I'm a FTM too but I've been feeling baby for about a month now. What you're describing sounds like what I felt at first - now her movements are a lot easier to distinguish since she's bigger.