What Causes Stomach Bloating, Body Temperature Rise And Tiredness After Menstruation?

Hi, i had my periods on june 9th,which came out with few brownish spots for 3 days.Then after 46 days(Jul 25th) i got my periods for 4 days which is of normal flow unlike my usual periods(heavy).During this time i feel tired,back pain,nausea and my stomach was also bloated.i have a regular period cycle and last month it got varied.After my 4 days of period also i have the same bloated stomach,rise of body temperature in night time and extreme tiredness.Could you please suggest what should i do or what is the reason for the current symptoms that i am facing?