Terrible mood swings

dev ✨

I get stressed about something for a day, overreact about it then for about a week I'm very depressed. I hate it but I can't help it. I get so down that all I want to do is lay in bed. I have a toddler and want to be happy for him but between depression and horrible mood swings it's just so hard. Why am I like this? I don't know why I do this or how to fix it.