Should I be worried?

Ana

According to this app I am 6w2d pregnant. I came home from doing some shopping and I carried 3 gallons inside at once. Afterwards I went to use the bathroom and did my business. After I was done I wiped and saw a smear of pink on the toilet paper. I'm kind of stressing out about it. Idk if I strained myself with the groceries or just going about my business in the bathroom. I have an appt tomorrow now with my OB that was originally supposed to be on the 22nd. I'm not spotting continuously. It was just at that moment and hopefully that is all it was. Any advice or words of wisdom anyone want to share to at least give me a sense of relief and hope that everything is fine?