preggers
stress?
you should probably go see a doctor.
"Within three months" means before the end of the three-month period or at any time during the duration of the three months.
Haven't Started
You can have a period for about three months after you have become pregnant, my mother had her's for about three months while she was pregnant with me.. That was actually the first time she had her menstrual any consecutive months.. Normally she would have her period once maybe twice a year. But when she got pregnant it was the first time she had her period more than once a year.
You are not possibly pregnant until it is a month late. Don't stress it. Cycles can vary from 28-38 days normally.
Yes. When you have only recently (around 18 months) started your period, it will be irregular and you may miss periods some months altogether. This is perfectly normal and doesn't mean you're pregnant or anything's wrong!
Go take a pregnancy test one that has three in the box to be sure.
If your period is a month late or you miss a period it can simply mean you didn't ovulate that month due to stress or ill health, there are various possible reasons. The odd late or absent period is nothing to worry about, if you miss more than three cycles in a row then see your doctor.
you will never have your period.
If by "late" you mean how long after you've lost your job, you are eligible. in most states, only for the base period of the first 4 of the last 5 complete calendar months, and the for a period of 2 months in that period. This is the norm, but not necessarily the same for all states as they all determine their own requirements. Its obviously best to apply as soon as possible after the job loss.