Thank you for your query.
Do not panic.
MMR is a very safe vaccine
She should get one if she has missed.
In any ways she should get one at 5 yrs and then another one at 13-15 yrs too.
Consult your doctor if the problem persists.
If you have any further queries you are free to consult me.
Hope this answers your query.
Wishing a speedy recovery.
Have a nice day.