Not sure what's going on with me.

I went from being tired and feeling depressed, a tickle in throat, cough, stuffy nose, to feeling Gorgeous, and Sexy but still tired, 4 days late on my period today. The longer it goes the better I feel. I've been peeing alot, not hungry but when I do finally get hungry I'm starving. I feel full of energy, super happy, I wake up several times a night thinking I'm late for work, I super hot but still have this cough and tickle in throat. This morning I woke up feeling great, except my left side of back hurts and my shoulder/collar bone hurts. I know this post is a mess but I'm super happy and hyper feeling which is unusual for me. Just don't know what could cause this. I love the feeling but worried about the missed period.

Update: tested this morning negative