Hello A.,
I'll bet she's ready to handle 2nd shot...Here's my story. . .
When my child was 2 years old and got a MMR shot. She got the shot, developed a high fever and had a seizure while I was holding her. It was terrifying. After several years of me refusing any vaccines for my daughter until they could explain to me what happened...finally the light bulb went off. The MMR caused a very, very high fever ---> the high fever caused the febrile seizure---> febrile seizures occur between ages 3months - 6 years old. Basically what I learned is that the vaccine did not cause the seizere...the vaccine caused the high fever...the high fever caused the seizure. The doctors at our practice confirmed this - shame on them for not explaining this to me sooner and just forcing me to figure it out...but this gave me enough peace to move forward.
Fast forward 4 years and it's time to register for school. My daughter went to a private kindergarten program that accepted her with only 1 MMR so we did not have to worry about this until 1st grade (age 6). But when it was time to enroll her into public school for 1st grade I prayed...held my breath and let her get the vaccine. I gave her one dose of ibuprofen before and after the vaccine at the doctors recommendation (to decrease the chance of a fever). I also refused to allow any other vaccines to be given to her on that day. So she got the MMR and nothing else. She was due for chicken pox too, but we separated that from the MMR just to be safe. It went fine...no fever and no reaction. Thank God. In your case your daughter already has built up immunity to 2 out of the 3...so she has an even better chance of not experiencing this again. Chances are, your daughter's better developed immune system will handle the 2nd shot like a champ - and she'll walk right out of that office and never know how much you worried over the whole ordeal. :-)
FYI
Who gets febrile seizures?
Children aged 3 months to 5 or 6 years may have tonic-clonic seizures when they have a high fever. These are called febrile seizures (pronounced FEB-rile) and occur in 2% to 5% of all children. There is a slight tendency for them to run in families. If a child's parents, brothers or sisters, or other close relatives have had febrile seizures, the child is a bit more likely to have them.
Hope things work out for you