"Pop" in top of head... SCARED!

[punkprincess19]

Hi, Ive had a headache since Friday and then came down with a stomach bug on Tuesday (vomiting and going the toilet). Anyways, last night I was lay in bed about to go to sleep and then I felt something "pop" in the top of my head near the front and then my head felt funny, like there was a cold liquid running through it. I instantly started to panic! My headache got worse and I was feeling really sick all night (I'm not sure whether the sick feeling is due to the stomach bug though). I rang NHS Direct this morning as I'm really worrying about it. The nurse (who didn't seem to quite know what she was doing) asked me a million and one questions and then advised me to take paracetamol and rest. I'm just really worried about the"popping" feeling that I had last night?! I keep getting strange feelings in my head too (pressure, tingly, cold liquid feeling, tense).

Am really scared, what if it's an aneurysm?

Can anyone please help?

Thanks! X