In need of opinions!

Okay so my husband and I have become interested in investing. We both agreed that we would start doing that when we got settled after our move (in a few months). We both agreed..it was fine. But he tells me this morning that he went ahead & invested in something (that I have absolutely no clue what it even is) and will be taking out $50 a month. We've been trying to save up money for our move so I don't know why he decided to do that right now. And I've been telling him recently how important it is to me that we act as a team..doing things together and treat each other as equals.

The thing is: I'm not working at the moment so he's the one making the money. But I feel like since we're married, it's OUR money. He has the mindset that it's all his money and he can do what he wants with it. (He's told me that before)

I need opinions. I'm so hurt how he went behind my back even though we clearly had an agreement.