Oh bugs I'm sorry this mc shiz really can wreak havoc in relationships. If it's only for a couple of weeks it won't matter anyway because by the sounds of it those couple of weeks will be outside The Window.
You are right that men don't know how to talk about these things. What sort of things are you arguing about anyway? Obviously arguments are more likely at a time when you have been feeling very fragile and upset so don't read too much into it. everyone argues sometimes anyway. Don't beat yourself up too much about it, I'm sure you haven't been a cow, you've been through a hard time and it is not all that long ago.
I would have a chat with him and say you also want to get things back on track, that the arguing has got to you too and make some plans to do some fun things together - perhaps a weekend away or a holiday if you can afford it. gives you something to look forward together and also something nice to talk about afterwards.
Avoid talking about ttc or the miscarriage for a while as much as possible. come and moan to us instead. The exception to that is that you are allowed to be upset the day your droid turns up. Obviously if he wants to talk about it then let him. It may be that he has done the "strong silent type" thing to help you through it but is now struggling with his own emotions.
It isn't the right thing for everyone but StealthTTC was probably what kept us sane throughout the mess. We rarely talked about it. I knew when the right times were of course. So long as he put the effort in he never had to hear anything about ttc, although he did know I was doing bathroom science. It's probably impossible for you to take a relaxed view of it because understandably, you want to get redifffed asap. but you do have to try to avoid it taking over your relationship.
If the arguing is about stuff totally unrelated to the MC but is happening because you are both feeling crap, then talk about the issue that is causing the argument and work out how to solve it.