Thanks IZ.
He was scared and I could just imagine him thinking - Oh my work-that woman is off her head!
I had wanted him home with me to chill, because I really felt terrible. He asked if we could go out for a drink with friends. It took a lot from me to force myself out, and only after he promised we could come home if I couldn't cope. As we were driving there, I freaked out because I couldn't find a parking. And promptly burst into tears.
But it was followed by a long lecture from myself again, that I HAVE sent him details and information on BP.
Back on track more or less.

I did feel it sneak up on me over a few days, but didn't expect it to knock me this flat, so I didn't take action to prevent it.