Just to add my two cents - I concur, never know when life will become difficult. Sometimes, it's 24 - 48 hours after packing too much in a day. Another instance today - I try to do a very slow turtle walk for about 20 minutes a day. Today, I went with my sister-in-law and realized afterwards that we conversed the whole way - had to have a long rest afterwards. Usually, I'm not walking and talking at the same time. Best to you - triggers are hard to find consistently.