Thanks for the query.
As you underwent tubectomy there is less chances for pregnancy
Some amount of irregularity is common in menstrual cycle.
That can occur due to many causes like poly cystic ovary disease, thyroid
The symptoms you are experiencing could be part of premenstrual syndrome
So you better consult gynecologist once and get examined, go for ultrasound
to find out the possible cause for your problem and take treatment accordingly.