Signs of implantation?

Would cramping, bloating/abdominal discomfort, & breast/nipple tenderness be signs of implantation? I’m 10dpo (next AF in 4 days) and have been bloating and cramping with abdominal discomfort for about 2-3 days 😩 my breasts have been feeling very sensitive too. if I’m not mistaken, I saw some brownish spots in my panties on Thursday (I was 8dpo) These don’t feel like my usual PMS symptoms (which is usually just pelvic cramps, slight bloating, & the sensation that I’m about to start bleeding 2 days before my period)