I have no idea what or why this is happening. Last 8 nights now I wake up between 2 and 3am after just a couple of hours of sleep. This is immensely frustrating and I notice the first emotion/feeling I have is one of slight panic as I check the time to figure "oh not again." It's now more than an hour since I've been up, trying my best to go back to sleep and it's just not happening as I do not feel sleepy/tired at all.

I guess why I'm sceptical about the caffeine link is because when I was sleeping fine just a few weeks ago, I was having my usual coffee/tea intake during the day and even a cup of tea before bed and having no issues. Now I've even cut out the green tea and just having red bush and peppermint tea (which has no caffeine) and still waking up after a couple of hours.