Is pregnancy possible?

Hi all, I had a normal period 2 weeks ago when it was due. I’m supposed to ovulate this week however, I haven’t been having any fertile discharge and my sex drive is soo very low. I have been having this horrible headache for the past 3-4 days, almost constantly and I’ve been sleeping a lot more. I know the chances of me being pregnant are very slim, but I can’t think of any other reason as to why I’m feeling this way. What do you guys think?

*we use the withdrawal method*