I am 6 weeks pregnant and started bleeding with very bad cramp...?

I am 6weeks pregnant and started gettin brown discharge which later that night lead to blood as I wiped i was very worried an went straight to the a&e for early pregnancies, which there they checked my cervix which was stil closed and was bleedin a little inside but could not find any reason, I was then told I was to go in a couple of days later for an internal scan, I then had my internal scan but they couldn't find my baby inside, which could be for a few reasons, I was earlier than I thought, I had already miscarried or my baby was growin outside my womb, as they could not deflect my problem I was to get blood taken to monitor my hormones, I had my first blood taken the same day and called back up the nxt day for result, (if my blood was below a certain point I would have already miscarried, if it was normal I was too go back 48hours after my first blood was taken for more blood, and if it had gone higher I would be fine but if it went lower than normal I was miscarrying), so I called today an my blood was normal so I have to go back tomorrow for my 2nd blood, in the mean time I have been passing which I would describe as blood tissue with my urine. I have accepted the fact I have miscarried now as I have no good signs of a pregnancy, I am very destraught as I tried for 2 years now, and am not sure how long it would take me next time round :( ....