Af question

So I’ve been TTC since April and nothing. I’ve always been regular 31-35 day cycle however I missed my period last month and freaked out, took 9 tests and all negative plus went to the doctors to take a test also negative. Yesterday I started spotting so was excited to see my AF is back. I can start tracking again, however it’s super light normally I’m light then go heavy for a day or two then back to light. So you see I’m confused since I missed my AF last month I’ve figured it be heavy this month but nope. Has this happen to anyone before? I have apt November 2nd to see if everything is ok. However I’m worried.....could it be I’m stressing to much on everything and lay off the tracking or what??? Help a girl out please!!!!