Early miscarriage?

Ashley • Mommy to a sweet little man!
I will be calling my OB on Monday to hopefully set up an appointment here soon but was just wondering about some of your personal experiences. I've been feeling pregnant for about three weeks now but started my period about 6 days ago. It was a very odd period and had a few of what looked like very faint positives. The bleeding seems to have completely stopped now (it was on and off from heavy to spotty with many color changes). Well I had (TMI) what looked like 2 small pieces light pink/ grey tissue in the toilet but I haven't had any severe cramps. I am a little achy/ crampy, but nothing very bad. I also went to the bathroom to check my pad (I had to urinate but am holding it) and there was a ton of whitish, stretchy discharge (TMI again, sorry).  I just found out that my best friend had a positive pregnancy test today, and since I don't know what's going on with my body I'm having conflicted feelings. Any input would be greatly appreciated!