Pink spotting at 5 weeks

Kalin

Hubby and I had sex for the first time since conception today. I noticed an hour after, when I went to the bathroom and wiped there was a bit of pink on the tp. It went away then a few hours later I go again and theres more and then it's gone too. I'm having dull cramps that just feel like my uterus is sore or something lol. I know its considered normal but I cant help but worry 😫