I'm worried about taking insulin and needles into egypt
You really don't need to be worried. Thousands of people who are diabetic visit Egypt and there are, obviously, diabetics in Egypt too.
I'm guessing you may be concerned because of the ongoing case concerning a United Kingdom citizen? That case is completely different: the woman took in controlled medication (controlled in the UK as well as Egypt) in very large quantities. She did not declare it and had no prescription for it. As with almost all countries, including the UK, it is really not a good idea to bring in prescription drugs without documentation...and most especially when it's not for your own use. :-/
The official UK government advice, confirming the official Egyptian advice, is that you take a doctor's letter confirming your need for both needles and insulin. Details on this page:
Your doctor will know how to formulate such a letter but do allow him/her ample time to write it. I'd also strongly suggest that you take your prescriptions with you.
You should of course ensure that you have full medical insurance cover. This site has helpful info about diabetic travel to Egypt, including the syringe sizes available there (scroll down):
Official advice here: