@autumn8018,
Sorry to hear that you are feeling so low.
You certainly have had a bunch of difficult stuff happen. These sorts of things can accumulate and leave us feeling terrible...often they all seem to gather themselves together and hit us a hammer blow at one time or another.
Have you ever seen anyone to help you deal with any of this?
If you seriously feel suicidal, you need to check in with whatever mental health service is in your area...or at least a good GP.
I doubt it is all that easy to get yourself committed, but talking with someone is a damn fine idea, as is a good assessment of what is going on for you, as there may be post-traumatic symptoms and unresolved grief as well as depression.
For most people, therapy with a good and competent person is the best idea. For some, a period on medication can also really help.
For most people, depression is a temporary state, though there is always some chance of relapse. Cognitive behavioural therapy with a really good person seems to be statistically the most helpful in preventing a relapse.
It often helps if you let people here know what country you are in...and state.
Lots of people here live in the USA and are good at helping you find resources in your area if you also live in the US. I am in Australia, and the US health system kind of baffles me, so I am not great at helping in that specific way.
This is not the time to revert to old habits and "put a bandaid" on your emotions. I doubt very much you are going crazy, but it sounds as if you really need some skilled support.
This may also not be the best time to make major decisions about your marriage, unless it is a negative and bad thing for you to be in. Would your husband be able to look at problems in the marriage with you, and be prepared to make some changes, too?
I am not sure when your child was born.....however, if it was fairly recently, you need to be wary of post-natal depression, and act fast, as not only is it bad for you to be depressed, untreated depression can get in the way of you and your son having the kind of relationship you want. Given your history of loss, a birth and parenting can be a time when those losses really hit....but it is also a great time to deal with them really effectively.
With help, you should be able to feel and stay a lot better. You sound very resilient.