Yep. It's normal to have a sore everything after a triple bypass. It'll get better soon.
Thanks. I had a really great answer all ready to add here, but somehow it got away. Just wanted to add that if the LIMA artery was used for a graft, the left side will be sore for quite a while, probably. This is due to nerve damage done while accessing that particular artery. You will get beyond "sore" and "pain" pretty soon, and be stuck with "different" for a long time. Same with the leg, assuming that they harvested veins from there for grafts. I had my triple back in 2003 and it still is different feeling. Sort of a numbish, tinglish, sensitive feeling. But, it can be gotten used to, and is not a real bother.
In a while, (6 or 8 years) you will all but have forgotten how much fun getting bypassed was. Anyway, it'll be getting better each day, slowly but surely. Hang in there.