Baby could easily still move in the next two months, but I know that I was in a lot of pain with Tink because her head was jammed under my ribs (they're still out of place) so I did put ice on her head and get her dad to talk to her low down on my bump. I had a bad back so couldn't get into some of the recommended positions.
I don't see why you shouldn't still have your homebirth if baby is breech, might be the best place for a breech baby to be born because it will be a lot more hands off. As it's your third it will probably be fairly easy to deliver anyway.
Ice is wonderful (and I have Raynaud's!) wrap a bag of peas in a towel and put it on your ribs where the most pressure is or on the head if you can feel it. Leave it for about ten minutes and you will feel the difference!