Is a little pink okay?

My husband and I had sex for the first time in a month. I haven't been able to because of the morning sickness but I finally feel ok today and, of course, I was super in the mood and ready for some fun. It didn't hurt at all, we both had a lot of fun.

Now I have some "fullness" in my belly. It feels heavy and full. About an hour after I noticed that there was the faintest amount of pink on the toilet paper. Is that ok?

Thank you for your responses. I feel a lot better knowing that many of you have experienced this too. There hasn't been anymore spotting since that first time.