Experiencing New Pain After Lumpectomy: Cause for Concern?

Hello, I had a lumpectomy a month ago. My diagnosis was invasive carcinoma of the right breast with ductal and lobular features grade 3 tumor, 1.7mm, ER+ at 99%, PR+ at 80%, HER2- and ki-67 at 90%, no lymph node involvement but they did remove 2. At surgery the surgeon found an additional smaller tumor at 3mm behind the main one. She also found 3 separate areas with DCIS insitu I think is what they call it. And several areas with micro calcifications. I had nearly every scan available with contrast. None of them saw any of it except the main one. They were able to remove all of it and have clear margins. The Onco test came back at 40 so chemo is recommended. I am assuming that's high because I haven't seen anyone else say this was that much. Last night I started having pain in my hips/pelvic area. Like a deep dull ache, it's hard to say if it's my bones or muscles. I'm scared that it has spread. Even though they said they got it all. There is nothing I did to cause the pain I'm feeling and it has lasted all night and day. I have never felt it before either. I am scared, I was hoping to be done soon. Pray for me.