Struggling, need reassurance

So today I woke up to husband yelling again. Yesterday was a day that my chronic illnesses decided to take over again. I woke up and was dizzy and nearly fainted. I had a migraine all day after that and decided to go to bed around midnight. Husband apparently got home at 1 am and was immediately infuriated that I wasn't awake to provide him sex for all his "hard work outside the home providing me a place to live". His words. I have COPD and anemia and they often take turns destroying my life and in turn my marriage. Because I am suppose to bury them and give him sex when he wants it...no matter how I feel. Last week I had to chew gum to keep from coughing during sex because my tonsils were inflamed (did I mention I often get tonsillitis too?) I often wonder if they would be better off without me but I know my kids would be devastated if I left. I have no job and he makes sure that I know what a burden that I am. But like...I have chronic tendonitis and heel spurs and COPD and recently diagnosed with GERD plus the anemia....working was very difficult last time I worked. I just need to have some advice and some reassurance right now because I literally have no one I can talk to...