Tracey, one of my friends gets breathlessness around her period, the nurse at her GP practice told her a colleague of hers was off work and had been wrongly diagnosed with asthma, she was then told she was peri menopausal and breathlessness was a common symptom. Like I said in my other post it really is hard to believe many of our symptoms can be hormone related. Hope this reassures you a bit.
CG x