"wrong medicine received from doctor"

Hi there! I have visited West Middlesex Hospital, particularly, Sexual Health department yesterday. I visit this clinic quiet often, because, since February,I can't get rid of one of the diseases (one and the same doctor keeps giving me one and the same medication despite the fact it doesn't work for me). So, yesterday I went there with another issue, so, basically, what happened was: the doctor I've seen many times before gave me a medication which later on I realised is not suitable for pregnant (which I am)! He knew I was pregnant, as he has done my pregnancy test prior to issuing a medication!!! I was totally shocked, concerned and wondered, how is that possible for a doctor to be that unprofessional and non caring. I went to a local pharmacy and just double checked with them that the medication I was given might be dangerous for me. I would not attend this clinic any more, as well as will warn all my friends to avoid getting any possible treatment in there. I hope other patients were treated right and my case is one and only that happened so far. Thanks Take care