Pregnancies less than a year apart

Hi there! I was wondering if anyone has experienced a pregnancy not long after their first baby was born? My daughter was born in February and my Husband and I are trying for another now. By my glow calendar today would have been the last day of my cycle but it has not come. I took a test and it was negative and I do not have any of the symptoms I had with my first pregnancy. So I wondered if anyone has had a similar experience and whether or not their second pregnancy presented with symptoms as strong as the first. I could just be late although that isn't common for me :) just thought I'd seek a little advice. Thanks!