Help!!! 😩

I have PCOS and have been TTC for almost 2 years... with pcos I understand it’s common for this to happen but for the past 6 months my period has been very regular and on the dot when the app says it will be.. but now this month I haven’t had my period at all... I’ve literally taken pregnancy test every morning since February 2 ( when my period was supposed to start) and all negative. I haven’t changed my diet or have done anything different. I do have an appointment on March 2nd but I’m just curious to what everyone else thinks about this? Also the past few days have been having severely bad cramps, and very very dizzy out of no where! I’m just so confused 😣💔