All, apologies for not updating earlier. I have not been near the internet for the last couple of weeks.
I am so touched that so many people have posted with support, and with their own experiences. Thank you, it has really helped.
The feeling of surrealism still exists.
I went to my GP, with a prepared note as I knew I would break down. He was really sympathetic. He thinks I may have sustained some nerve damage, and warned it may take approx 2 months for it to heal. My arm was absolute agony for ages, although it is not so bad now though the bruising is still visible and I am still getting pins & needles. I am seeing my specialist for a review appointment for my shoulder next week.
I spoke with my DH about what happened. He was apologetic, and again reiterated that he was very stressed with work. He said he was gutted by what had happened, and undertook it would never happen again. We have discussed ways of altering his working pattern to reduce stress - he is going to ask his boss for reduced hours. (I'm still really pissed off - I get really stressed by my job but don't go round starting arguments & hitting people ) - For those who asked, my DH is not in the same line of work as me.
At this point I am not prepared to end my marriage over what may (hopefully) be a one off incident, although nor do I intend to do nothing and wait in fear of a recurrence. I agree that DH needs to get some sort of external help in managing his stress and anger. I haven't as yet, but I am going to contact women's aid for my own support.
I have decided not to report this incident to the police. I have my own reasons for this decision - part of which is that I think there is generally a lack of support for DV victims who report abuse, yet remain with their spouses / partners. Nor am I prepared at this stage to be the subject of gossip within my job - whilst I work with some fantastic, dedicated, professional officers, there are sadly too many others who would try to undermine me - but misogyny within the police is too long a subject for this thread! Some may disagree with my decision. I have told my DH that should anything like this ever happen in the future, I will report it to the police.
I will be changing back to my normal posting name now. Thanks again for your words of advice, I hope never to have to post under such circumstances again.