If you are thinking about suicide then it would be well to talk to someone at Crisis Services Canada (crisisservicescanada .ca) They should also have the information about GA or similar in your area.
You will probably need tell your husband what the immediate situation is anyway. It would be better to tell him than for him to find out in a bad way. I would imagine if he is working then there would be ways to find money to cover the immediate situation. It would be wise for you not to have access to the family finances whilst you are still gambling, but I know losing control is a difficult decision for gamblers. If you can – get your husband to look at some of the posts in the families and friends forum, where he can see what he might need to do to support not just you, but himself and the child as well.
I wonder if you are having any counseling or support for your problem with alcohol? If not, I suggest that you talk to a medical professional about your issues and see if counseling could be available to you.
Don’t feel that you are alone with this – reach out to others who understand and try and put the shame you feel to one side. There is no shame in asking for support – I have done so and do not regret it. I wish you well.