I am having my periods irregular suddenly.. it happens on 27th of every month, but now I missed periods in may month.. it happens in june 3rd.. now it's July and still it does not come.. and I m feeling vomiting but vomiting also not happening it's just I m feeling.. there is no chance of pregnancy as I know it.. can anyone suggest me the reason behind this and I m not able to eat excess food.. my stomach is looking that I have eaten so much.. plsss suggest me