My dd went to bed last night feeling very slightly warm but no cough, sneezing, runny nose, or irritable. After I went to bed, she started sleeping fitfully, and today she's got a runny nose and a cough. This is my 10 month old's second cold though, so I can tell you what we did last time!
She was definitely worse at night, her fever would go up then and I was hesitant to use baby tylenol because she was still ebf and I didn't want all the artificial colors and flavors in her body. (Dh was allergic to artificial colors/flavors as a child, they made him hyper and unable to sleep, and I did NOT want her to have that reaction. I *might* use the baby tylenol this time, we'll see.)
She vomited once or twice at about 8pm on the first 4 nights. She'd cry and cry, refusing to nurse, no holding position seemed to help either although layind down was worst, vomit up mucus, and then she'd be back to fairly normal. The ped said it was common with head colds where the baby has post nasal drip running into their stomachs, which makes their stomach queasy. This was the scariest thing for me, and I'm just DREADING the thought that it could happen again!
I bought both a baby version of Vick's Vaporrub and an all natual baby bath that's supposed to be soothing for colds and smells kinda like the baby vicks. Post puke, every night, she and I had a warm bath with the soothing bath stuff, which would get her nose running, we'd use the bulb syringe to make it easier for her to breathe, and then she'd nurse to sleep in the rocking chair. I put the baby vicks on when she woke up during the night, and tried to nurse sitting up.
How long it lasts, ours was 2 bad nights, 2 slightly better nights, then a day or two of more tired than usual and a bit of snotty nose lingering, then we were done.
Happy with my DH, 2 kids, dog, fish, and frogs