Welcome!

If you feel that your wife is not psychologically able to care for your very little child, something must be done. Have you talked to your wife's parents or siblings about your concerns? Obviously, you are also hoping to get your wife help, too. If she cannot be coerced to get help, you may have to take strong action to protect your child, especially if your wife could be of harm to your child, herself, or others. Worst case scenario, if she doesn't accept help, is to call the cops for a wellness check, if she is a danger. I wouldn't call them if she is clearly not. Perhaps a lawyer could be consulted, too, if it gets to that point.

You may benefit from seeking advice from a therapist or organization like NAMI. I'm not sure what else to suggest. I don't have magic answers for you. I imagine it is hard enough helping a sick spouse, assuming she is sick. When children are involved, surely harder yet. When I have been very sick with my bipolar disorder, if I didn't have my husband to look after our pet (we have no children), our pet would have been at risk.