i need help

I need a little advice. I've come to the conclusion that I'm suicidal but I don't want to die.. I think about driving my car into a tree or into a lake. I think about what it would be like if I were to slit my wrists. But I know I would never do any of that. I love my life. I love my husband, I love my son, I love my family and friends. I've been feeling like this since I had my son. it comes and goes. some days are better than others 🤷 maybe it's a form of PPD, I dont know. all I know is I can't go to a doctor about it because I'm scared of losing my son and I have no health insurance.. how do I go about telling my husband how i feel? how do I tell him that even though I love our life and I'm happy, I still have these thoughts? how do I get rid of them? 😔