Pink discharge

Amber
Hi ladies! I have a question. I usually have a normal, but heavy/painful period (I have endometriosis) that lasts usually about 6 days. The 6th day is usually light and finishing up. This month, my period was light and over on the 4th day. No bleeding or spotting the 5th or 6th day. Today, I am on CD 7 and around lunch time, I used the restroom and had pink discharge when I wiped. Does anyone know what this could be? I have also experienced sharp but not constant pain in the area of my left hip, but slightly lower. The last two times I've been to the bathroom, it's the same pink discharge when I wipe. Just thought this was odd and have never had it before. Any ideas?