Hello and welcome to HCM.
I understand your concern.
Pain in pelvic area,back and
abdominal bloating leading to irregular menses can be due to gynaecological problems like
Polycystic ovary syndrome,Pelvic inflammatory diseases etc
If I were your treating doctor,I recommend,
-Body weight control by regular exercising moderately.Balanced diet containg cereals,pulses,fruits,vegetables,dairy products.
-Tab dicylcomine or
meftal spas as and when needed to relieve
abdominal pain.
-De stress yourself by yoga,meditation,engaging in some hobby.
-I advice certain investigations like haemogram for anaemia,thyroid tests,USG abdo pelvis for gynaecological problems. Further treatment depends upon the result of these tests.
Hope this information helps.
Thanks and regards.