So my ex and I have been having sex recently (with a condom always and he always pulls out), and I'm a week late on my period. If I'm ever late it's only by 2 or 3 days, the most was 4 or 5. I took 2 pregnancy tests today and both were negative. I'm just really confused and I'm not sure what it is I should be doing. What could be another cause to such a late period?