Possible Pregnancy? Highly unlikely.

Anyone have negative home pregnancy tests and negative blood test and later discover they are in fact pregnant? I have been having odd cycles and that is out of my norm 100%. I have had countless faint positives and negative blood work, however I have had a variety of odd symptoms and my period has been off by close to 2 weeks that past 2 months and I am NEVER late. Someone PLEASE give me some support. I feel lost. The faint results have persisted and so has my odd cycle. my first positive pregnancy test was on Feb 16.