High bbt after period. Help please?

Jenni
Hi ladies!! 
I'm new to the forum thing and kinda hoping someone can give me a little insight. 
Have any of you ever had high bbt's after your period? Is it common? 
I ovulated Oct. 31 and my temps were looking ok. Nov. 13 I started spotting, then I had a light period on nov. 14th and 15th then just spotting on nov. 16. My temps never went down, they actually went up. Yesterday, 16 days after my last "period" I had spotting, with a temp dip, but still not below my previous cover line, and today I have light bleeding and my temp spiked back up. 
My chart looks long because I've taken out the "start" dates so you can see my pattern. 
I've taken a dozen test and they all come back negetive. I don't understAnd why the high bbt's still. Any help would be appreciated. Thanks ladies!!!