Advice—I’m desperate 😥

So, this is my first time being pregnant, but I have a 3yo step-daughter. I don’t have any other mom apps to really utilize yet (I didn’t think I could use the baby glow app yet since I’m currently tracking a pregnancy?).

She had a viral cold (cough/nasal drip-congestion) back around Thanksgiving. She got better, but has maintained an ever slight cough that is VERY sporadic. It’s now a month later and right when we were just barely coughing she saw her mom, who is known to do drugs and vape and such, and came back coughing way more again (her visits are supervised but relationships are strained). We did have a temperature change drastically from Christmas eve/Day to yesterday by way of from 50’s back down to the 30’s.

Was the change in cough brought on by temperature change? Her mom potentially doing stuff around her or having it on her?? Or could it possibly be underlying kids asthma/allergies (yes, I know this will require testing. We are in the process of scheduling with a doctor)?

Any recommendations on care?? We’ve literally tried cough medicine, allergy medicine, etc. and it only seems to be like a mild help…