Did I miscarry? or could I still be pregnant?

So, I took a pregnancy test on Friday, 6th and it was negative. After feeling quite symptomatic for early pregnancy signs, ie nausea, lethargy, etc..., I retook a test on Wed, May 11. It was positive. Then on Friday, May 13, I started what seemed like a normal period that has lasted for the past 3 days. Could I have miscarried? I would be close to 5 weeks along now, so I would think that this is later than implantation bleeding. I won't have health insurance until June 1st, so I intend to set up an appointment early June.