Doubts??

If your last period was at the end of January, you're not yet 5 or 6 weeks pregnant. Pregnancy is calculated from the first day of your last period. If you've ovulated, you could be pregnant, but you'll need to wait for your expected period before testing, otherwise you might get a false negative because there usually aren't enough hormones in your body yet to be detected. So if you don't get your period on February 21 (when you expect it), then you can test. By the way, the tests from the pharmacy work fine as long as you use them after your expected period; I've always used them myself. But this applies to all tests: they're more reliable after your expected period than before, simply because there are more hormones to detect then.