Well first thing I want to say Is WELCOME!!!
Also, take a picture just now, in your underwear and either keep it on your phone or in a folder somewhere on your Computer. This will be your before picture and something you can compare loss to.
Then if you haven't already, download My Fitness Pal.
Make yourself some reasonable and achievable goals, once you don't fit in clothing anymore, throw it out!!! Then treat yourself to new clothes instead of the the odd food treat.
Is your husband up for having a healthier diet? See this as the last time you will ever need to lose a large amount of weight and slowly take the time to learn about nutrition and exercise and bring it all in bit by bit. find out what calories you are eating just now, reduce it to a weight loss amount and start moving for at least 20 mins per day.
I hope that some of these help, if you have already gone this far, then I have even more