HELP ME!! Implantation or ovulation?!

Destiny • Mommy to Allison Grace, January 23rd is MY DAY ⛄ 19 years young, born in the wrong generation.

So this is my first time posting. I had my 3 year old when I was 16, now we both of full-time jobs, I am very excelled in the medical field and we are buying our first house. So we decided it's time to try for another bundle of joy! I had what I thought was my period but EXTREMELY light and about a week early, keep in mind everyone thought I was pregnant but we never told anyone we were trying. It lasted for 7 days. I got a blood pregnancy test done because I found it odd and it was negative. fast forward to first day of ovulation and after sex I started bleeding pretty heavy bit was Pink and brick red AND BROWN. The next day I had clots come out so I went to the ER and left with no answers. That was yesterday, today it has slowed down to almost nothing but a few light pink dots. We had intercourse a day before ovulation, the first day when the heavy bleeding started as well as the last two days of the light period. Has anyone ever had this? Opinions!! Help ease my mind!!