Forehead thermometer accuracy..?

These were my daughters scans from both sides of her head. (From middle of forehead to temple.) both sides are reading different. Her armpit thermometer is broken and this is all I have to go off of.

I had taken her in to see her pediatrician a few days ago. They said it is just a cold. She had no fever at the time we took her in. She has also gotten more congested since then and has developed a horrid wet cough. I’m doing everything the dr recommend. She is so miserable. Advice please. According to this thermometer she never goes under 99.5 despite lukewarm baths or infant Tylenol. She had just finished getting over a flu the week prior..

She is 7 months old if that makes a difference.