Sometimes periods can be missed for reasons other than pregnancy like your hormones are out of whack, you skipped ovulation that month, or you ovulated late. The only way to find out is to take the test. The worst that can happen is that you find out you're pregnant (which you're already stressing over anyways) but you might also find out you're not and be able to quit freaking. With how long it's been I would just test now, you don't need to use morning urine, you'd have tons of HcG in your system at this point.