I get quite a lot of aches and pains and I often wind up feeling nauseous so I'd say it's normal preggy stuff. I actually felt quite off and exhausted last night as I'd done preggy yoga yesterday and worked quite hard. I think the extra stretching may have released some toxins (like massage can do) and that's why I felt off. I slept well and feel great today though (albeit a bit sore from all the wonderful yoga poses!).

Being on your feet is very tiring while pregnant too hon. Only last weekend I experienced the joys of this as it was my 30th birthday and I was cleaning and preparing food all day then up entertaining guests until 2am. My lower back was agony and once again, I wound up feeling off.

So based on my experiences, I'd say it's all normal. Take it a bit easier from now on and I suggest a warm, relaxing bath and drink lots of water when you feel like you've overdone it.

PS: as Saram said though, bring up the tingling sensations with your health care provider