Paranoid about preterm labor.

I have a cold right now and I also have this irrational fear that if I cough or sneeze or try to have a bowel movement "too hard" I'll trigger preterm labor. I know it doesn't work like that but like I said irrational fear. I'm only 29 and 1/2 weeks and I know she needs to stay in for a while longer to get strong enough so when I have a coughing fit I get so nervous with my belly shaking and my abs tensing... ugh, stresses me out!