Worried about Liv

I know I'm stressing for nothing, but I can't help it  :sigh 

Liv's been feeling cruddy for a few days now...low grade fever for one day, sore throat, bit of a cough (really not bad at all), and really, really tired (Thurs & Fri she came home from school and fell asleep on the couch - this is always a major indicator to me she isn't feeling well)

All that aside, what REALLY worries me is that, since she's been ill, she's felt several 'stabs' (that's how she describes it when she feels her pacer kick in)  Now, she HAS felt this in the past, but like maybe once every 2-3mths...definitely not a frequent thing like this.  Also, when she'd felt in the past I did bring it up to her Cardio/EP and he said it was totally normal & some kids DO feel their pacer (some don't) and we should actually take comfort in knowing it means the pacer is working.  I know this, but I'm worried about the fact it's doing it so frequently.  When she had problems in the past and fainted/had seizures it was always when she was sick.  Illnesses weaken her enough that it puts stress on her heart and causes these problems.  I KNOW it's irrational, but I'm terrified something will happen and her pacer will stop working :cry