Lifting and job

Today I lifted and felt kinda weak.  It felt like I struggled to do my normal lifting routine and felt completely exhausted.  I thought I had an interview with a company but it turned out to be a webinar and I’m supposed to e-mail them for an interview.  The webinar made it sound like a suspicious company so I haven’t decided if I want to e-mail them back.  I am currently looking for a local job or possibly finding a job in Colorado and moving.  What do you think I should do?