Does stress or anger cause a difficult delivery?

Im having contractions since yesterday and im full term so i know ill be having my baby one of these days just waiting for the contractions to be strong enough to go to the hospital but i just got in a huge fight with my husband and i literally got so bad (i ugly cried and all) i was so overwhelmed and the contractions didnt help but now in scared that because i got go mad and stressed and all that that i tensed myself up and ill have a difficult deliver.... is that true?