Hello there!
May I offer a few words - namely yes for sure lack of sleep and flu symptoms will not help your state of mind but bear in mind also that there has been some extreme weather on the surface of the sun and repercussions such as mood swings and headaches are just a small part of the knock on effect this has on our planet.
Our bodies are a bunch of electrical impulses and space weather is very relevant to how we feel so keep an eye on solar activity, The past 10 days have been especially active for this.
Good luck and I hope you feel stronger and clearer soon.
It is interesting to think about and wonder how much effect it can have upon our synapses.