Severe depression

So, I’ve been depressed for years, I had my son 7/23/18, and ever since I had him my depression and anxiety has gotten 100000 times worse, any little thing triggers me, I have thought about every possible way I can end my life, I’ve planned it, so many times, I can’t work because I feel like I’m losing control of myself, I can’t think straight , my hands are always shaking , my hair is falling out. My husband is so supportive and I feel like I’m letting him down, since he’s the one that pays everything. I don’t know what to do 😞