Serious asthma and meditation, how much should I struggle? Is anxiety at night ok?

I have struggled with serious chronic asthma all my life. I started meditating and in general felt very relaxed. However a few years into the practice my asthma became very serious. One night I fell asleep and dreamt of crawling under a rock and falling asleep forever. I said to myself (in my dream), 'no, I must carry on'. I then woke up only to find myself hardly breathing. I think I almost died that night. I want to keep meditating and dedicate myself to 'the way'. I feel great happiness and peace this way. I also don't want to be so at peace as to lose my life. I have allowed myself a level of anxiety ever since and wake up at night regularly which is important in order to take medications when I need it however I feel the anxiety of course means I'm no longer at peace. I have also tried to increase medication and move to a better environment but my health has not improved. What is the buddhist way in this situation? Possibly another way of phrasing this question is how much should I struggle to stay alive. I'm not scared by death but also I don't want to die. I'm happy to hear perspectives from different practices and lineages.