Could it just be stress?

I have been under some stress these few days and got sick because of it but i’ve been having some weird symptoms like I have had a late period, been a bit gassy, having some diarrhea, alot of headaches, very dehydrated and my boob have been a little bigger . Also i haven’t been eating like usual and not having enough sleep.
My period has finished but I am still bloated.

I will be going to the doctor soon but I would just want to know in advance if it is something serious.