Will give nice maternity assistant lady a quick call - I'm sure it's nothing, but have also been suffering with the gut from hell - probably I just have some manky bug! Have also been quite hot for last 48 hours, but thought this was just late pregnancy related (38 and a bit weeks).
Spoke to maternity assistant and she says that it sounds like I have unpleasant bug, nothing sinister. She said if headaches worsen, or I get any other symptoms, to give her a call and she'll arrange for me to pop into maternity unit for a bit of monitoring.
She also said link with RLT is highly unlikely, so I'll optimistically continue with that in the hope of fantastically efficient contractions...
Baby is supremely unconcerned by my mad gut, temperature and headaches and is leaping around, so presumably it is not affected..