Missed period

Jamie • Married
Been tracking and logging when my monthly period comes, February, March, and April had normal cycle, haven't had a cycle in May, and now June 24 and still no sign took numerous pregnancy tests, all negative, went to my OBgyn doctor took a pregnancy test there, also negative so I made them draw blood work from me to see if I'm pregnant or not still waiting for results! Note I was diagnosed with PCOS a while back, had one tubal pregnancy back in 2010! There has been no changes in my diet, haven't been around anyone sick, just worried about what's going on with my body can someone help or give advice please!