I'm 25. Have had DM since 14. I have had radiotherapy on my thyroid as it was going nuts. I've recently started having episodic SVT's - although my heart is fine. I'm tearful, for no reason. Irritable. I've had an IUD fitted which is causing real discomfort but don't want to use the pill (no more hormones thanks). I'm really struggling...where do I begin to sort myself out!?