Could I be pregnant?I have a 26 day cycle and I was 6 days late I'm never late. If anything I'm early. ?

I have a 26 day cycle and I was 6 days late I'm never late. If anything my cycles early. I've been ttc for a year now with no luck. I have been having cramping very light on/ off the past week and a half and my "period" if that it was, was pinkish/orange then it barley filled a tampon (sry if tmi) Then it was only 3 days long and it ended brown and gooey (sry tmi again) I didn't have cramps with my period and now I do? But also my nipples have been a little sensitive I'm naseous on/off and I have little shooting pains in my pelvic area and also in my breasts!! What do you think could I be pregnant?