Opinions needed

5 days before my period (Thursday) I began bleeding and it tapered off the second day and has been a teaspoon or two since then. Supposed to start my period tomorrow.

Had sex on or after ovulation January 9th. From reading, the timeline is adding up perfectly to be implantation bleeding.

I know all women are different, but I experienced cramping the first day of the bleeding. Now I have loss of appetite so much so I'm eating one meal a day. I'm still taking prenatal vitamins so I still get my nutrients. I feel bloated on that I can't button my jeans anymore. My boobs feel bigger, but aren't sore since bigger for me is still an A cup lol just a 36 and not 34.

Could I be??? Still testing negative, but I read sometimes you won't test positive until a week after implantation.

Thoughts? Opinions?