Hello. You have been fully answered. Please talk to your mother. Best of health to you.
I think you've been answered previously from what I can see. So, will just reiterate past advice that you seem quite anxious and are overanalyzing things. Anxiety can be an issue all on its own and needs treatment just like other disorders. Please consider that this may be going on for you and talk to your doctor or your mom about seeing a doctor for anxiety.
All of this can be attributed to a period coming. Most girls your age are irregular too. You are so hyper focused on things that you are feeling every ache, cramp, etc. and it makes you more worried. You need to get out of the worry trap! There is nothing --- NOTHING ---- out of the ordinary that you write of.
Hormones fluctuate with all women throughout their cycle and cause various things to happen and it is all normal.
Talk to your mom about this high level of anxiety you have. good luck
Oh and I do have a cold right now