So I am almost 7 weeks postpartum. I am exclusively pumping my breast milk and feeding it to my son in a bottle. No formula no breast. Just pumped breast milk. I started brown spotting yesterday and a little more pink/ red blood today. Could I be getting my period this soon?? While I’m giving exclusively breast milk? Or could I be pregnant. ( implantation bleeding ) we have had unprotected sex a couple times first one being April 7th please let me know what you guys think or experienced.