Spotting

I took letrozole from cycle day 3-7, I reached my peak fertility days later which was cycle day 10 with creamy cm. Cycle day 22-24 there was a small amount of very light pink spotting to where you can see it if u pay attention. Then cycle day 25 there was a lot of pinkish/ brown when wiped followed later on that that day when I went urinate there was red blood in the toilet so I'm thinking my cycle started I put on a tampon. Next day cycle day 26 tampon wasn't full I went to use the rest room nothing in toilet but was red blood wen I wiped no clots could this be my cycle or implantation I'm having cramps but not how my periods cramps normally will be