Periods and ttc

So I had my last period on the 26th January.

It lasted 5 days. I had unprotected sex the two following days.

Yesterday I experienced this tiny bit of bleeding which I never have had so I’m really confused.

Today I experienced pains and cramps for around 1 minute. Which felt like I was about to come on my period again.

I have had nothing since

Has anyone experienced this?