Period starting or implantation bleeding?

My period last month started on the 17th and ended on the 21st. I started testing for a surge on the 22nd and didn’t get a surge until the 3rd and 4th of this month. Yesterday (09/06) I had pink tinted discharge but nothing else. Today I looked again and there’s nothing as of yet. My period isn’t supposed to start for 10 more days. Has anyone else experienced this and then found out they were pregnant later on or is this just a sign that my period is coming earlier than planned?