Tired mommy ☹️

My daughter has been very fussy. She has a runny nose. I suction the most I can but doesn’t seem to work. Her eyes are really red & kept sneezing. She has been gassy for a while now I’ve been using mylicon drops. & doing bicycles. I took her to her doctor yesterday because she kept spitting the bottle out & she gags & her tongue is really white so I thought maybe it’s thrush. Her feeding times are all over the place. Her doctor told me it’s not thrush. He said it’s just things newborns do. Idk what to do. Could it be allergies? I have a 5 year old that had a cold for about 3 days could she be getting a cold? I am exhausted. We didn’t go to sleep till 4 am. 🥺