could I be pregnant?

No contraception method used. I usually have a 25 day cycle with a red-blood (sorry if tmi) 4 day bleed. Last cycle I had a 3 day pink bleed and I didn't think anything of it since it lasted for 3 days but here I am with no bleeding on cd 28(3 days late for period) on my new cycle and I am never late, it's always like clockwork for me. I'm wondering if I got pregnant last cycle and my "period" last cycle was actually an implantation bleed?