Trouble with husband

Hey all. So weve been trying for 2 years this jan. I’ve had one mc. It was hard. But we are fighting all the time. We’ve been married 6 years. Most of the time we fight because of his shit mother who has been an issue from the very beginning for us. She’s hated me - always treated me like an outsider. She’s got so impactful that it’s effecting our relationship. We don’t live together anymore - but she’s still there if you know what I mean. Life at 34 is not how I imagined it. Can you even get pregnant if you aren’t even happy all the time? Anyone else have issues with the MIL or husband? Thanks all xx