Period is MIA... what’s going on??

Katie • 27, Married for 2 years, TTC Baby #1 since Sept. 2018

Thoughts? I see the Dr. Mon. Today I’m12 days late. As of Sat. pregnancy test was neg. Haven’t tested since. Super fatigued, acne revving up, even getting backne (gross, I know). Lots of discharge lately. Messed up cycle due to hormonal imbalance, maybe?