Fear of breakdown

I had a d&c on July 31st, after having a missed miscarriage at 6 weeks. Now, 3 months later, I have to have a lumpectomy at the same hospital for a lump on my breast that I felt a month ago. My doctors say that it's likely benign but they gave me a choice to have a surgical biopsy since it was too vascular for a normal biopsy. I should be 5 months pregnant right now but instead of dealing with a breast cancer scare. Also, I was ttc before I discovered the lump and I haven't been using precautions so there's a chance I will get a positive pregnancy test when I go for my pre-op blood work tomorrow. So I just realized I'm going to the same surgical center that I had my d&c at and now I'm freaking out that I can't go through with the surgery because it's going to be too painful just to be there. It's too soon after my loss, I feel like I'm going to have a breakdown if I go there. What do I do?