Period or implantation bleeding?

Hi everyone,

I'm 20 years old and have had my period since I was 10. I've never missed one, and the most it's been late is around 3 days, other than that one time it's always on time and I never have any major issues. However, it's been 7 days since it was supposed to start and I've been cramping the entire time. I had all the symptoms of a period except bleeding. I am sexually active (but I'm not on BC so we use a condom) and I got worried it might be late because something happened, although we always check the condom just in case and nothing was broken or anything. Today I started what to me looks like a period, but I'm still cramping much worse than I ever have before. I'm planning on going to get everything checked out as soon as my "period" is over, but I was wondering if anyone has any experience with something similar?

This is what it looked like the second time I wiped, I threw the first wipe away, but it looked the same only more in volume.