I usually get my period on time or a day or two early. Today is my 28th day and I haven't gotten it, nor do I feel like I usually do before I get it. My husband and I had unprotected sex twice, but he pulled out. I feel warm, tired, sore breasts, spotting, and no cramping. I took one of those first response tests that say they can detect pregnancy five days early, and it came back negative. Is it still too early to tell?