Hi, I had the same thing very early in this pg, and it still gives me grief when I work alot. I'm a dental nurse, which means I have a bad lower back anyway LOL. I've been very lucky in that I could reduce my hours, so I only work 7 days a fortnight now. Reducing my hours has helped alot, but if we have a particularly long day I find that I'm very uncomfortable by the end of it. It's an awful ache!
I spoke to my Ob about it, he said that his dental nurse and dentist pts have the worst back probs, and that as long as I keep working it will probably be a problem. I have to admit, being on hols for the last three weeks has really helped, I've hardly had any pain at all. My OB did suggest using heat packs on the area to try and relieve the discomfort.
It certainly is very normal, but if it's getting unbearable maybe you could see about changing your hours, or your role until you go on mat. leave. Good luck!
BTW I still find that my tummy is bigger, probably more bloated, at the end of the day! I definitely noticed it in the first trimester.
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