My period was late on Tuesday (not today) it actually ended up being 3 days late , this Saturday I got my period and it normally last about 5,6 days but this time it was only here for 3 normal flow on the first day and light on the next two days I tried the bleach test and my urine foamed over numerous times so I thought I was pregnant !!! I just took a first response test and nothing what should I do ?