Help! Should I be worried??

Lilly • Mum to two girls.
So we had KFC for dinner last night and had leftover chicken. I was hankering for a piece today and ate it, cold, without even thinking. As soon as I realised what I'd done I googled it straight after and realised it was a huge pregnancy no no. It's done now, I know, but I'm freaking out! I'm 18w2d. :(