Well.. It happened

My step daughter brought a cold over last week and it got to my husband and then me, were both feeling better but now my 6 week old sounds a little congested/wheezy on and off. I have the cool mist dehumidifier going in her room while she naps in her swing and used the baby vapor body wash on her last night. She's been napping longer stretches but is still eating and dirtying diapers like normal

I took her temp earlier with the forehead scanner and it was about 99.2 - Do I need to call her doctor? Any tips for helping her?