Could I still be pregnant after bleeding?

Kay • Have a beautiful 3yr old daughter, TTC #2.. M/c in February 2014 & chemical pregnancy in June 2014 ?❤️
After my period being late and having loads of symptoms I took few pregnancy tests between the 18th-22nd June starting as faint positives getting darker each day so I knew for sure I was pregnant.. 
​On Monday the 23rd I started bleeding and thought I was misscarring again (had a previous m/c in February 2014) so I went to the hospital and the doctor tested my urine and said there test was negative? Yet I'd take a test a few hours before going to the hospital and mine was an obvious strong positive? ? and the doctor cudnt understand why mine were positive and there's were negative! 
​She sent me home and told me to re-test in 2weeks time. 
​The bleeding I had lasted 5days like a normal period, no heavy bleeding, no clots or pain. I caved in an took a test 2days later on the Wednesday and got a faint positive and tested again on the Saturday and got another faint positive.. I shud take a test today being 2weeks but I'm scared incase it's a full negative ? 
​I put it in my head that I'm not pregnant anymore but I weighd myself thismorning and have put 4lb in weight on!