Tummy is always bloated. no periods 9 days late. thought i'm pregnant but i'm not. so what is going on...! only 22. period always come on time?

Blood work: you could be pregnant. you need blood work to evaluate for early pregnancy. if not pregnant, stress can cause an irregular cycle along with weight changes. I would recommend an exam if this persists

Late period: A period "9 days late" may be due to a late ovulation caused by excessive stress, lack of sleep, emotional strain. Ovulation preceds the onset of a period by almost exactly 14 days, so if your cycles are usually 28-30 days apart, being "ate" with bloating may indicate an early pregnancy. Use a serum HCG test (very accurate). Ovarian cysts can cause bloating in the absence of pregnancy.