Can someone please help me?

Hi
I was wondering if anyone here recognizes this or has experienced it. It goes like this.
On July 9th was the first day of my period; it usually lasts 7 days, counting from the start of brown discharge until the end. Now, on July 21st and 23rd, I had a drop or two of light bleeding, which I always get around my ovulation. My cycle is usually 32 days long.
On Friday, July 2nd, I had a panty liner with pink spotting, and nothing else the rest of the day. Saturday was completely clear, and on Sunday, July 4th, I had a bit of brownish discharge again. After that, I had nothing more.
On Monday, July 5th, I had a blood test done, and it was negative. My doctor told me to wait a few days and see how it goes, and do another test if necessary. Now, this morning on July 9th, I took a pregnancy test again, and it was negative, so I really don't know what to think.
Is there still a chance of pregnancy because I tested too early? But since I had some spotting on Friday, enough to fill a panty liner, and then a light pink color, I thought about implantation, but shouldn't the test be positive by then, right?
Sorry for the long post, but I completely lost track of what's going on and I'm going crazy with this uncertainty.