Pain in throat when laying flat that makes me worried about my breathing while sleeping. only when laying flat-no other symptoms except upset stomach.

Reflux: Gastro-esophageal reflux can cause throat pain as well as heartburn and is often worse after lying down.Treatment: use a foam rubber wedge to elevate upper body while sleeping, don't eat or drink within 4 hours of bedtime, eat several small meals instead of large meals, acid suppression medication such as Prilosec for 2-3 weeks, Tums (calcium carbonate) or Rolaids for quick relief.*See a physician if symptoms persist