Always listen to your gut instinct!
I would rather have ppl say I'm over reacting than feel guilty for not doing something and then just wondering!!!!
Follow it through until you're completely at peace that you've done all you can to find the answer to your problem.
I was really worried about my daughters head when she was about 6 months old as she had to go to physic for a bad neck from birth.
This meant that one side of her head was flattened. I went to many doctors and got second opinions about getting her a helmet, but in the end, I felt at peace with not getting it as it was not that bad.
good luck!!!
Jacinta x