Iam 27 year old. I have a daughter of 3yrs old. i need to ask you about my health. I didn't get my periods this month. i have checked for pergancy but it is negative. can you tell me why my periods were skipped? and now a days i am feeling very irrated and showing angry on my daughter by which iam not happy. sometime i feel so irrated and i wanted to go for complete health check up. so can you tell me what all tests should i do?