Hello, Thank you for your query. Yes it is too early to think of pregnancy. Premenstrual symptoms can mimics early pregnancy symptoms. One sign of pregnancy is a missed period. If you have missed your period, take a home pregnancy test. If negative and still no period, repeat pregnancy test after a week. If still negative wait for another week and see your OBGYN to check for ovarian cysts or other hormonal imbalances. Thyroid abnormalities, stress, sudden weight changes, major lifestyle changes, illness, travel across time zones can all cause delayed periods. A blood beta hcg level will confirm if you are pregnant or not sooner. Hope this helps. Please let me know if there is anything else I can help you with. Wish you good health