My daughter scared me just now. She used to do this: she'd inhale sharply and throw her arms out to…

My daughter scared me just now. She used to do this: she'd inhale sharply and throw her arms out to the sides, as if she couldn't get enough air. She did this a few times in a row just now, like she couldn't breathe in properly. I thought it might be snot, so I tried to clean it out and suck it out, but not much came out. Then it happened again: she coughed, tried to inhale, and it was like she couldn't. I was about to call an ambulance, but then she seemed to be breathing normally. It's a bit warm in the house, so I aired it out, and now she's sleeping. Her temperature is 37.5°C after her vaccination, so I gave her a suppository and I'm waiting for it to go down. Ladies, has anyone experienced this? What could be the cause? Is it really just snot, or could it be something else, God forbid? The doctor listened to her today and said her lungs and throat are clear. She used to do this sometimes and then spit up, and I told the doctor, who said it might be air coming out of her stomach, but this time it definitely wasn't air.