Advice please :(

Rebecca
So 2 weeks ago I found out I was pregnant and had strong positives on 3 different tests. By my last period I would have been 5w4days. 2 days later I started spitting brown discharge and then a few hours later had bleeding and cramps. The cramps and bleeding lasted only a few hours and then for 3 days after I had no cramps just spotting.  I took another test and there was faint positive still. Tommorrow I will be 8 weeks and have my early scan. 2 days ago I took a test and it was faint faint positive and this morning I used 2 cheap test strips and they where negative. Just wondering if this sounds like I have miscarried or maybe it's just because I have used a different cheap test this morning? I just can't bare being told I've lost it tommorrow so clinging on to any hope :( and I didn't think I'd bled that much for a miscarriage. Any advice would be appreciated X