It is not too early depending on the type of test you take. Some are far more accurate and can tell you immediately after just a few days from your last period. Be sure to use morning stream as this is when hormones are most prominent. A sure fire test is a blood test, as the others may result in a false negative.
I had unprotected sex on march 2nd and I took a pregnancy test at the clinic on march 18th and I got a negative result but I missed my period and I have frequent headaches I am always lightheaded and I found myself sleeping more also around my aerolas are very sore was it too early to test? Or is there just something wrong with me? Please help!