Possibly pregnant?

I had my period (or what I think was my period) last Wednesday but it was only 2-3 days. But today, I peed and wiped and there was some pink mixed in with the cm. and now I'm crampy, not bad like period cramps, but light ones. We have been ttc and when it started on Wednesday, I automatically thought it was my period. Could it be spotting? And should I test?