Sex, Stress, and Crying

I had sex this morning and after I receive bad news about my family 
(perfect timing😑) 
I have been crying and stressed out all morning. It got so bad I started hyperventilating and now I have BH and a tiny back ache in my lower back. I'm currently 36 +2, is it possible that I accidentally started preterm labor? Before the phone call I received I was already having cramps because of the intercourse- not too bad, but still irritating. 
Not too sure what to do or if everything is okay and I'm just being paranoid