Could i be pregnant? is it to early to test?

Me and my husband are ttc I had my iud "mirena" taken out in april and we are now trying for another bby..I'm wondering if its too soon to take a pregnancy test right now"based on the first day of my last period I should be three weeks right now...I'm to excited and I want to find out..should I take a test or should I just wait? Thanx for u help