I have lupus, and take immune suppressing drugs (cellcept, and prednisone) and about 2 months ago i had dental work done to have cavities filled. the dentist is aware of my conditions and drugs because like every dentist they have you fill out those new patient forms asking for your conditions and drugs, etc. Yet they never warned or asked me about going on antibiotics prior to or after the filling, then a month or so later i acquired an infected abscess on my back that required surgery and 6-8 weeks of IV antibiotics which is especially hard to treat while on coumadin and immunosuppressing drugs.
My doctors are leaning towards the dental work as the cause of the infection as its easy for bacteria to gain access to the blood stream during dental work and im very prone to infection. regardless this has caused me to lose 2 weeks of work for hospitilization and much stress, do i have any sort of case to sue for malpractice? or is this just a bad luck sort of thing?

