MRI delayed

I went in this afternoon for my MRI and hit a hiccup. Apparently the contrasting agent they use is a poison which is fine for me but would be terrible if I was pregnant. Because of the timing of my cycle and when we found out there was a problem with my mammogram, I wasn't 1oo% sure that I wasn't pregnant. So, we ran a pregnancy test. An hour and a half later when we got the results of the test, they had moved on with other appointments. It was going to be atleast another hour before they could get me in. The additional wait just wasn't worth it. I rescheduled for Monday morning. So, I have an MRI at 9:15 and a meeting with the surgeon at 3:30. Feels like a lot of sending my son off to friends and family so that I can go to appointments. I am really thankful to have family and friends in town that can take him, but its still no fun. It breaks my heart becuase I like having him with me.
I noticed the other day that there is a large quarter sized lump right under the area where they did the biopsy. I noticed it the other day in the shower. Talked to some nurses and it should just be a blood clot and the body working on healing itself after the biopsy, but this morning it has started to ache in that area. I'll have to wait and see what happens with it today. Please pray that it's nothing.