new to ovulation testing strips

Today is cycle day 4 (just finished my period)so I decided to start testing for my LH surge so I wouldnt miss it. I just took it now and I got a Smiley face. So this means I'm in my most fertile time according to my box instructions?? and it says I don't need to test again because I am in my fertile time.. has anyone else got their surge as early as this? i mean i wouldn't even be making love until a couple days after my period. Should I keep testing since it's my first time using them?.. i do have 20 left :)