Wendy’s burger had slight pink! Freaking out.

So we’re on the road and unfortunately had to stop at Wendy’s for lunch. I got a burger and didn’t notice until half way through that it was slightly pink towards the center. I’m normally so cautious about this stuff and didn’t expect Wendy’s to have pink in their meat patties at all. I’m flipping out. I’m only 4.5 weeks and I’m so terrified now. Please help. What should I do?