What strikes me is how unempathetic your SO is and his inability to listen and/or extend emotional support, even when you spoke about getting help.

I think getting it checked out is a good idea (e.g. therapy) but I also wonder about your SO. Is this how this is going to be from now on? Each time you struggle or if life throws you (either just you or the both of you) a curveball, he will disengage, snap and accuse you of thinking too much?? He comes across as cold and unsupportive.