I always panic when my baby is not feeling well. Can you share some tips on how to stay calm when this situation happens?

It is okay to feel panic when baby is not feeling well. I do panic when mine is sick too but I always tell myself that this is the time baby needed me the most so I have to be calm. Do not attempt to google the symptoms online as it will just pile on to the worries you already had. Most likely you will end up with a serious condition when it is just something minor. Bring baby to the doctor as you deem fit. Monitor baby and let the doctor know so that he can have a better diagnosis. Nobody understands how unwell is your baby other than you.