no contraceptive method is 100% effective so it is always advisable to take a pregnancy test if you think that you might be pregnant regardless of the type of contraception you are currently using or have used in the past. a pregnancy test only reacts to the pregnancy hormone human chorionic gonadotropin (hcg). however if you are pregnant this hormone will not be present in your urine or blood until 13 to 16 days after ovulation (the release of an egg) which is around the time that you would normally get your period. until this time has passed it will not be possible to see a positive result in a pregnancy test. urine tests require a certain level of hcg to be present in order to indicate a positive pregnancy result. blood tests are more sensitive because they can detect a smaller amount of hcg which means that pregnancies can be picked up earlier usually between six to eight days after ovulation. you can have a blood test at your gp surgery but it is recommended that you take a home urine test before booking an appointment. source :- pharmacysell
i am on the pill. i missed my last period am now on day 17 and just had a little bit of spotting. could i be pregnant? . i did not miss any pills last cycle nor have i in this cycle.