<human>: For the past year of my life I have been utterly and complete depressed. This depression is streaming from my fear that I may have been contaminated with lead. I am not sure if this fear is rational and I should be afraid, or irrational. About a year ago I got a part time job at an this mechanics/car lot. I worked with 15 other people, moving cars in and around the lot and making sure they were in the right spots. The reason I am so worried is I know some of the tire weight they used at this shop were lead weights. I was able to see some of the lead weight here or there across the lot my fear which may be irrational comes from my fear that I may have brought some of that lead with me into my car and into my home on my clothes or shoes from being around it. Or got some in me from eating food or drinking coffee that was in or around the break room of the shop. Should I believe this fear may be irrational based on the doctors visits for a lead blood test, that they said was negative. I took it 6 months after quieting. Or the fact that theirs a lot of people that work there. I can not seem to say how much this fear has totally changed my life. I am someone who values learning and intelligence, and the idea that my part time job could have a harmful effect on my brain is driving me to a inescapable depression. I need someone to help me please if you can say anything I would appreciate it.

Summarize the given text in a few sentences.
<bot>: I worked at an auto parts car lot with lead weights. I have a debilitating fear that I may have brought lead dust home with me or ingested while there.