Irregular cycles

I ovulated on a Sunday. We did the deed ;). My temperature spiked the next morning. I started going to the chiropractor that day to maybe help regulate my cycles. The next morning my temperature dropped back down. 
We waited to see if my period would come or if I was pregnant. Took a test about 17 days later with no period. Negative test. Thought maybe too early. Started spotting the next day. Continued spotting for a week and an a half. Never regular bleeding. Even for my disturbingly irregular cycles. 
That ended Tuesday this week. The last few days I've been exhausted and higher sex drive and have gained weight despite cutting out sugar and exercising regularly. 
Is it possible I'm pregnant or ovulating soon? Or is it all in my head? 
Any help or ideas or comments are more than welcome.