Sore balls on feet?

I'm trying to figure out if I should go into a minor stress/panic (ie be concerned).

I've had to go up a shoe size over the weekend as the tops were digging into my feet across the top of my feet. The only size 10 ones I could find reasonably cheaply have a slight wedge to the heel. (I don't see the point in spending a lot on shoes that only need to get me through a month of school) I've had no problems with wedges in the past but have been wearing flats mainly since being pg. the heel is not more than about 3cm.
Today right from early on the balls of both my feet have been sore, not quite cramping but feels similar. Normally if this happens I just get out my golf ball and roll my foot over it for a few minutes and it gets better. Tried tonight and I nearly cramped up badly and it hurts just as much since I stopped. Its mainly near my toes rather than the balls of my feet.
Currently I have my feet on an ice pack to try to ease the ouch. Throughout the school day I've been kicking off my shoes and going barefoot (I'm in the library and it's carpeted) where possible.

It has been hot recently so I've drunk a reasonable amount of liquid. I haven't had much salty food during the heat so don't know if that makes a difference either.

ETA on top of that I seem to be coming Down with a site throat today which means I'm drinking a fair bit of water as well.

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Hi,
I've been complaining of sore feet lately too (I'm 31 weeks). Not sure where you're located, but the weather has cooled in Melb/Vic the last couple of days and my feet are not so puffy or sore. I haven't had any cramping like you've had, doesn't sound like much fun. Are you raising your feet up on the couch when possible?
I wouldn't be too concerned about it (unless it keeps cramping and you can't get any relief), as it just sounds like 3rd trimester in summer. I had massive kankles and sausage toes with my first summer pregnancy (a March baby) and then even bigger feet and kankles after the emerg c/s. They were huge. I distinctly remember a couple of weeks after birth, marvelling at my 'dainty little feet' again, and seeing the bones and normal looking toes again.
I think you can soak your feet in Epsom salts to see if this helps reduce the cramping. As I type this last sentence, I'm wondering why on earth I haven't done this myself, yet?
Hope your feet calm down for you soon

Will try Epsom salts tomorrow; thanks for that idea - need to grab some from shop on way home.

I wasn't sure if it was likely to be a third trimester in summer thing or not (ds was born in winter).
I have been putting my feet up as much as possible and my feet haven't seemed to have been swollen as much today as they were Thursday / friday last week when we had the hot weather here in Adelaide. Thankfully it's cooled down yesterday and today ( <25 and rain today)


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