That's really all you do have.
You may not have priorities or an abundant understanding that each day offers precisely 24 hours, but you definitely have time.
Time, as it ends up, is relational, how you relate to time is how you relate to everything.
You don't have a time management issue, you have a relationship management issue, and more specifically, an issue with how you relate to yourself.
Someone taught you how to (or not to) relate to yourself (modeled behavior), so you're not doing anything wrong, and neither did they, we're all doing the best we can with what we've got.
You don't need to put forth lots of effort to overcome subconscious patterns of protective behavior; you mostly have to be aware that you're participating in it, and then surrender.
"Life, if well lived, is long enough." Seneca