Period 5 days late, no period... NEGATIVE PREGNANCY TEST

amber • Trying for my first since 2/1/2018

I have about a 35 day cycle... This is the first time it has come late.. I do not know what’s going on, maybe it the new medicine. (I’m taking Otezla, for my psoriasis) could that be the reason? I’m switching jobs.... idk, I have been trying for 15 months.... when will my time come? I don’t know what to do.