Hi welcome to Health care magic forum.
Dont worry , some times it will happen like this, It appears that you had gastric bleeding due to some or other reason, due to that you started feeling like dizzy, vomiting
feeling, heart rate
is high , all these things are due to this blood in the stomach only.
Reason might be bleeding peptic ulcer
. Your period, hot water shower etc have nothing to do with. It is important to exclude hypertensinpon,
I advise you to consult a gastroenterologist
for diagnosis and treatment.
You may have to get gastroscopy, besides other routine tests for confermation.
Wishing for a quick recovery, and thanks for calling.