Bleeding and cramping in vagina day after sex, 10 weeks pregnant

Last night me and my husband had sex for the first time in 3 weeks.
This morning when I woke up and went to pee, I noticed that the water had a faint pink hue. The next time I peed I saw one little drop of blood. When I wiped there was a little bit of old blood.
I also had a few mild cramps in my vagina but they have now stopped. (It feels much lower than my abdomen).
Should I be worried?

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