Late, long, and light period...

I am really confused, ladies. I have a drs appt for Monday, but I need some support before then (I am going crazy trying guess what is happening!).

I have been trying for my second child for 2 years now. It's been a difficult road thus far. This past month, I was late with many pregnancy symptoms (very tender breasts, etc) and so excited. I took pregnancy tests, but they were all negative. I got my period after being three days late, but it was not my typical period. It did not get as heavy as usual and it lasted a LOT longer than normal (mine is usually 5 days and this ones lasted 9). Also, it was more of a reddish brown then bright red and WAY lighter than usual. I am still spotting(today is day 11). This past month I have started exercising, so I chalked it up to my body changing to adjust.

I took an ovulation test today (since I should be ovulating in a few days) and it immediately showed positive (which is odd because I thought I had a few days left). I decided to take a pregnancy test for kicks, and it came back as a faint positive as well. I am SO confused.

Has anyone had a similar experience? Could I have miscarried but still have high HCG levels? Does this mean I should skip trying this month? Please help. I am utterly confused.