I feel hopeless

I feel like everytime I try to get on top of things, something happens. I try getting back to doing things in my life like walking and next day and all week long I have an asthma flare up, I can barely cook dinner without being out of breath, can't have a bath or shower without feeling the same. I've had to quit my job over three years ago, the mental health system is crap and you basically have to deal with things by yourself. I'm over people telling me it's all in my head and things will get better, well how about you take my life and see how you live. I get told to rest, not happening when you live by yourself. No one else is gonna cook or go shopping. I just want to be able to think clearly without having outbursts from medication. I'm just venting but it's hard. I feel isolated and have had trust broken so many times I wouldn't even know who to let in.