Thanks @Charl881 @Flowersflowers121 !
The pain came on really suddenly on Monday night and it was a sharp pain, definitely not cramps, possibly wind but didn't feel like it. I rang EPU in the evening and they said if it's still there in the morning call back and they'll get me in for a scan. They think the cause of the pain was actually my ovary as they can see I ovulated on the right which was interesting! Apparently pain from the ovulating ovary can happen for the first few weeks.
But @Charl881 and @Doodle10 I would just ring - even if they say they can't do anything you know where you stand and worrying just makes everything worse!