Help?

Hello, all. I am 8 weeks and 2 days along. This morning my fiancée and I just had sex, and when I went to the bathroom afterwards and wiped, I saw the tiniest bit of blood on the tissue... I investigated further and it doesn’t appear that there was any vaginal bleeding, just my normal clear discharge. Should I be worried? My first pre-natal appointment is this coming Tuesday and I’m stressing about every little symptom.... We haven’t had sex for about a week so I’m wondering if it was just because it had been a little longer than usual. I don’t know..... thoughts?