Period a week late. tomorrow is the last day of the month and no signs of a period when should i test? i was late 4 days last month then my period cme

Yes: However if there seems to be a pattern of longer cycles ;you should make an appointment to be evaluated.Please remember that cycles are counted from the 1stday of 1to the 1stday of the other cycle.

Now should be OK: Home pregnancy tests are generally reliable by 12 days after ovulation. If your period is due or late, the test should be reliable