Raghe and Glex - Thanks for the words. I think I may have to see a doctor. I got a poor nights sleep last night cos each time I rolled over it hurt. Foolishly I still went to work but they sent me home almost straight away so here I am. It's Sunday so no doctor for me today. I'm taking painkillers and gonna get Ria to massage it later (hopefully).
Glex - think you might be right. I was telling one of the other cops at the station about it and they said they suffered something really similar to it years ago and it was a trapped nerve and it keeps flaring up ever since and has really hindered their exercising.
That is not what I wanted to hear.