Confused..

So last Friday I had some cramping ( not normal af cramps) when I went to the bathroom there was pink when I whipped. The next morning there was brownish red and the nothing for the rest of the day. (I thought that It was implantation) A week days went by and on Tuesday night I had some spotting and then Wednesday morning and Thursday trough out the day it was a heavy flow like the start of Af but Thursday night it was beginning to stop and Friday morning nothing. Now when I whip it's brownish. So not sure what is going on if it's af or is this a pregnancy sign or miscarriage. 
Also af was due last Sunday on the 4th and they normally last for 5 to 7 days