Pg Test Thur Got A Very Faint +. Fri Night

pg test Thur got a very faint +. fri night started bleeding heavy lasted till sun morning had clots ext pain and bloating b4 bleeding. went to er sun they said my hcg level 3. so they thing chemical preg or false + but sore breast returned once heavy bleeding stopped. period due date was today/tomorrow. was spotting on and off b4 + test. so what going on was i preg or am i preg or what?