Misscarriage

I wanted some advice - last month i did a test as i noticed i was eating more craving snacks and sleeping alot more period was one week late so i dis a test a digital one said not pregnant a tesco one had a faint pink line so we tnought thats great about two days later i started bleeding i thought maybe implantation bleeding but then it got heavier i thought oh maybe its my period and test is wrong i had te worst cramps ive ever felt i was told by a pregnant friend she thinks i was having a misscarriage bleeding stopped after two days, does this muck up your periods? My period tracker on here says im due on thursday but my ither one says in ten days normally im due on now because my mum comes on just a day or two after me, could i be pregannt again?