Long Venting Session

So my husband and are TTC our first and between our jobs it will be a miracle if it ever happens. He is gone half of every month. I am usually gone a week of every month. So timing with my magical week is problematic at best. To top it off job is extreamly physically demanding and ZERO concessions will be made until I have a positive blood test done by a dr. I am forced to work with harmful chemicals, 12-28 hr shifts with no sleep but heavy caffeine drinking to stay awake, lifting things that are way too heavy, basically anything you shouldn't be doing while preggo. Perhaps I'm over reacting but I feel like even if my husband and I manage to time it perfectly, my job will kill off any baby before it has a chance. I really pray I'm wrong! Oh and no I can't quit.... under contract for another 2+ years. Ughhhhhh sorry to vent!