Jen, I'm really sorry for what you've been through this year. You will not only be suffering the physical discomforts of a miscarriage but you will also be grieving .... for the 3rd time in one year which is a hell of a lot to bear and you need to do whatever you need to do. If that means being "anti-social" then so be it.
When I had a (singular) miscarriage I actively grieved for months (as in not wanting to go out, see people etc). I still carry a lot of internal grief now more than 5 years on if something reminds me of it, though am okay day to day. As with grieving for anybody - old, young, or never to be born - each individual is different and there is no "right" timeframe for you to be "back to normal". It takes as long as it takes and the attitude of your friends is appallingly selfish and insensitive - really quite cruel in fact IMO.
As for your DH then yes, he is grieving (or should be) too and yes, his way of coping may be different to yours, but that shouldn't mean he then makes you feel bad for not falling in line with his way of thinking. Apart from anything, you will also be suffering from the effects a big surge of hormones can have on your emotions, as well as on your body. Men don't have that to get through as well, nor the unpleasant and upsetting physicality of a miscarriage either ...... however upset they are, women do have more to recover from, in all senses, when you lose a baby.
I would definitely go to your mum's if he insists these friends are still coming round though I am fuming at the thought of you having to escape out of your own home in order to get some peace and quiet, and some TLC. It must feel very hurtful that he isn't suggesting this, not only cancelling the weekend, but looking after you, running baths, cooking for you, looking after your son or whatever you need.
When you feel up to it you need to tell him (if you haven't already) in no uncertain terms how hurtful he's being. What's more important here ? - the football or his wife ?