Period help!

Brandy • 21. Baylor. Child Development. TTC #1. Hypothyroidism & Hashimoto`s.
So I've had regular periods since I stopped my birth control in January. Well this month I haven't had a period & I haven't had sex so pregnancy isn't an option. I have all the symptoms that come with having a period but no actual bleeding... Does anyone have a clue what's going on?