I have never seen your presentation in my practice. I can only guess that there is probably no infection invloved, infection generally cuses redness and bleeding. I Ischemia is generally caused by retraction cord packing, but usually transient. I assume the temporary crown might be subgingivally overcontoured or residual temporary cement is left in the gingival sulcus.
Why is the whiteness getting worse now that I am on antibiotics? It is only around the 2 temp crowns. No where else in my mouth,.
Oral soft tissue appearing white is generally associated with hyperkeratosis, ischemia, or plaque accumulation. Going back to your dentist to have a follow-up exam is advised.