May be due to premenopause..But do get some basic test like CBC,
TSH,RBS and pelvic ultrasound done..Also get paps smear test done.
To know more about paps smear test, check this link on my website
https://gynaetalks.com/know-about-paps-smear-test/
Also take this quiz and see what all you know about your health..its a simple quiz, do take it
https://gynaetalks.com/cervical-cancer-quiz-women-health/