I've started noticing a pulsing sensation in my lower abdomen. Every d…

I've started noticing a pulsing sensation in my lower abdomen. Every day, sometimes even several times. The pulsation is like a clock ticking every second. I feel it when I touch my stomach. What could this be? I thought it might be worse than just hiccups. It happens especially at night or after eating. Girls, maybe someone knows what it is, is it dangerous?