Confused and anxious😥😧

I've always had irregular periods, sometimes 2 in one month, or other times mudding a month or two and not being pregnant. My dr recommended bc to help regulate it, and it worked mostly. I was on bc got about 3 years, and now ive been off for 1 yr while ttc. My periods are still a little irregular but not as bad as before. Well the past few days ive randomly gotten nausea, I've been weirdly gassy, and very tender breasts for a few days. I feel like my period should have been last week but its not always on time. Today i started spotting bright red and ive had really sharp painful cramping, and I'm wondering/hoping if it may be implantation cramps spotting? Is there a way to tell? My periods aren't very long normally so i don't know if waiting it out will make much of a difference