My son, one of them had these seizures when he got high fevers. It was until he was about almost 6 yrs old when he didn't get them anymore. it is true if they hadn't told you they really do out grow them. They don't have the same effect on the brain like other type seizures that are life time type that have to have medication to be controlled. What controls the seizures your little one has is as soon as that baby gets a fever get the tylenol or advill what have you to reduce the fever asap. it only happen when they have a fever but if you get the fever down you won't have to deal with these seizures and the scare of them. Just remember when your child has one not to panic, what for it to be over and get the fever reducing meds in asap.
After going through this 3-4 times and seeing it I became used to it to know when my little one was sick. You will with experience to know when your little one is starting to get sick and you will get to the point you check her temp when you thing something is coming on.
After she's done with the antibiotics she'll be better and you don't have to worry. She won't have this happen and your mind will adjust to learning to evaluate if your child is starting to get sick. It's harder many times more when they are smaller as my son got older 3, 4 yrs old is became easier to know he might be starting to come down with something.
Many blessings to you, you are reacting like any other mom who first has to deal with this until their little one is 5 yrs old. You will be fine you can always count on talking to us moms when and if this happens again a high fever, we are always here to support you and remind you this is going to pass being worried is normal.