I Was Told I Had Chlamydia And I Took The

I was told I had chlamydia and I took the pills...then I also told my doctor I hadn't had a period for two months and they took the pregnancy test.. All were negative...now I am on my period pills for my birth control and I am having bad cramps and brown blood....I took abortion pills over a year ago and nothing has been the same since....what is wrong with me?