[the sandman]

My phone keeps ringing randomly as if I am getting a text message but when I look at my phone there is nothing on it. It does it randomly through out the entire day but it doesn't do it just once and stops, it does it like 30 times in one period and then it stops and then does it all over again like an hour later. Did any one else experience this craziness? Btw this started happening like a couple weeks after I flashed my phone to Adrynalyns 6.1 rom and it does it every day.