STRESS!!!

It seems my family has had a very stressful few months.  We have been affected by the oil and gas layoffs, financial stress is crazy.  And then I found out I was preggers.  Great news, bad time.  Then to top everything off......I had to put my beloved 17yr old cat to sleep today.  
How bad is stress really on an early pregnancy? (6 weeks) I'm feeling at the end of my rope. I'm trying to keep myself in check because I have 2 children 6 and 4!