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What we generally consider to be normal range is 97.6 to 99.6, therefore 99.9 is a very low-grade fever. This is nothing to be concerned about and you've already written that your daughter has a cold so that explains the low-grade temp. If this wasn't taken rectally, I suggest you do it that way.

You sound like a first-time mom. Very young kids can run some alarming temperatures and occasionally a very high fever can trigger a febrile seizure. "Febrile" means "pertains to fever", or "caused by fever". These seizures are terrifying for parents to witness but are harmless to the child.

"My daughter is two and she looks sick." -- I'm not surprised. You wrote that she has a cold therefore she IS sick and she has all the discomforts of a cold that you would. Encourage her to drink lots of cold fluids. This can soothe a sore throat, keep respiratory secretions thin making them easier to cough up, keep her hydrated and help maintain a comfortable body temperature. Check the ingredients of her cold medicine. It's very likely that it contains acetaminophen, which is the active ingredient in Tylenol. Don't give her ibuprofen (Children's Motrin or Advil) or Children's Tylenol on top of this. She's already getting a full dose.

"Should I go back to the doctor?" -- No need unless you enjoy making co-pays. What you've described isn't at all serious and is in fact minor. She should recover in a few days.

No. Technically according to pediatric ER nurses (link below) a fever is a temperature in excess of 100.4 degrees farenheit. When my son had cancer as a 3 year old they told me to ignore temperatures under 101.0

yes it can and if its a child with this fever you should be careful get then check out anything over 98 degrees

yes

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