depo birth control

Hi guys, I decided to get birth control on feb 26 2018 it started off okay. But then after a week and half I started to expiernce really bad dizziness I couldn’t even get up. I was fatigue all the time. And I thought maybe I’m just getting use to it, or maybe i need a new glasses

Prescription. I went to the eye doctor it had changed a little but not enough to cause my dizziness THAT bad. It’s been three months already and I’m still feeling super dizzy, any thoughts of why this is happening to me?