What Causes Prolonged Vaginal Bleeding While On Contraceptive Pills?

Hello I am penny I have been having problems because the contraceptive pill I was on called micranor got discontinued so I was put on a new one a month ago and you take it without a break the same time everyday and since I ve been on them I haven t stopped bleeding so I went doctors and they put me on a combined pill levest and I ve been on that about 2 weeks and I m still bleeding I am due to go away soon on holiday i need a tablet that s gonna stop my bleeding completely I ve had it before as when I was on the injection last year I had the same problem is there anything in the pharmists I can get instead of going doctors as there s a big waiting list to be seen?