Hi, if your period has been regular, then probably can test using pregnancy kit one week after the expected menses date. Usually there are some symptoms that appear and is very similar to PMS. So, try to take note of telltale sign of your body being different like feeling sore to boobs/nipples, unexplainable tiredness especially after a good night's rest. Usually if the test kit shows positive (assuming it is taken 1 week after you missed your period), it is still very early in pregnancy (either 4 or 5 weeks), thus need to rest more. Some people may have more obvious signs after 8 weeks.
Read more