From the pics, it looks like your hair has more shine and less frizz. As far as density, we will take your word for it. You are a very lovely girl.

You know your hair best and what it feels like. I would definitely look into the depo as a possible cause. I just did a quick google for the side effects and found that reduced hair growth, alopecia are two that are listed. It is probably the same for many other BC that have hormones. What made me think of it is that a lot of ladies, myself included, experience hair loss during pregnancy. HTH
2a (, 2a/2bFii (fia), normal porosity

Cowash:TN Radiant Volume
RO TN Moisturizing .
Styling products:AVG, Ecostyler Crystal
Styling Methods: Pixie-style diffusing - total fav
Low-poo: AO Nourishing Lavender

saved by grace, walking by faith