Not being able to STAY asleep

[GoblinMason (Craig)]

I know trouble sleeping had been discussed before, but it's usually about falling asleep. I rarely have any trouble falling asleep, just staying that way.

Over the last week or so, I've just been randomly waking up every night after only about four hours. It's been like clockwork, and then it's hard to get back to sleep. I've never had this problem before. In fact, if anything I usually oversleep, and I sleep very heavily. It takes a lot to wake me up.

This is starting to get really annoying as four hours is clearly not enough sleep and I feel groggy and tired during the day.

Anyone experience anything similar? I thought it might be a fluke, but it keeps happening every night after 21 years of good sleeping every night...Is there something wrong with me?

Thanks.

Craig