I had the same around that time... I'd feel movements for a few days in a row, and then nothing for a few days... now a few weeks on, bub has grown a lot and I'm getting lots of regular movement all throughout the day, everyday.

I'm sure it's cos bubba is still small, but like has been suggested, maybe have half a can of coke and lie down for a bit and see. If you are still worried, I'd definitely chat to your health carer just for peace of mind - or pop into the local hospital as I'm sure they could have a quick listen of bub's heart (or ultrasound if needed).

Let us know how you go