Dear mom,
Raynaud's phenomenon is a vascular condition where peripheral arteries constrict in response to cold. It usually presents in women in their 20's-30's. The fingers are usually affected although toes, ear-lobes and the nose may also be affected. The characteristic change in color sequence is first white, then blue then red with rewarming. The treatment for Raynaud's is avoidance of cold by dressing warmly (or moving South:) In severe cases calcium channel blocking drugs may be used.
I have never heard of a link between Raynaud's and heart problems. There is a condition of coronary artery spasm but this is not usually brought on by cold and is not usually in children. Has your daughter been evaluated for asthma? This can be triggered by cold and may present as chest pain.
Does you daughter do any coughing at night? How much does she have to blow the nose. Does she drink lots of milk? Is she tired alot. Now like any other problems, signs are not aways there all the time. They have a way of coming and going and getting you all confused. Thats where a doctor comes in and runs the test. Go to the doctor with knowlege and they will help you more. :-)
Super best wishes,
Buzz