My girlfriend is experiencing an increased heart rate for a few moments around lunchtime and some general chest pain near her shoulder on the right side, which hurts to press hard on. She's also feeling some intermittent stabbing/numb pains in her right arm. She has Haemophilia C and has was diagnosed with anemia as a child. She has recently been using one crutch for a damaged tendon in her right foot (but switched arms regularly), but has stopped now after ~3 weeks of use. She is also 2 months into a desk job, when she used to work in retail. She saw her GP a few days ago, who tested blood pressure and listened for heart arrythmias but found nothing abnormal. She has considered ibuprofen, but was warned off it due to the Haemophilia. She has cut down her consumption of Coke Zero, coffee and seldom has alcohol, but after 5 days is still experiencing the symptoms above. She's thinking of getting some light exercise on a rowing machine, but I think she's worried about exacerbating it. Please can you offer any advice?