period

Hey, i had my period July 1-5 and had a positive ovulation test on the 12th ovulated on the 13TH about a week later I noticed hard lumps in both breast and they are sore so i started bleeding on the 25 i think as a period and also the 26 so today which is the 27 i’m having light pink brownish blood like it’s going off my cycle is usually 5 days long and some is spotting and yes lumps are still in breasts could this be implantation bleeding ? could i be pregnant?