my daughter 20 is 5mths pregnant. she is an athlete(track, shot put) has continued to train. was doing light sit ups yesterday, on a bench. arms above head ,just lifting shoulders off bench not a major crunch. he coach noticed her arms turned blue? underneath mostly. she did say her veins have been more blue. anything to wonder about. there was no pain or dizzyness. but she has had dizzy spells, and is tired, also low in iron.