help! food question!

Hannah • 5 beautiful children 14 angel babies pregnant and shooting for #6: the last one

I was at my in-laws and they cooked burgers. we all sat down to eat I make my burger take a bite and realize it's cooked medium rare at best. I usually eat my burgers medium well which is brown with a thin pink stripe. I wanted to not eat it but I'm hypoglycemic and I needed to eat so I ate half of it. now I keep having a pain in my tummy and I'm freaking out! it's not a severe pain and I'm not having any other symptoms other than anxiety cause I'm terrified to get E coli. is there anyone who can out my mind at ease!?!?