Depression or lack of motivation?

So I had a plan to get up at 8 and go on a 10 minute run or walk every morning as long as I didn’t have anything to do. Lately, it’s been getting harder and harder to get out of bed let alone go on a walk/ run. I have struggled with depression before and it has been sneaking back recently because I’ve had my 6th seizure. I don’t know if this is because of my medicine though either. I’m also running out of motivation to play softball, a sport that I have loved playing since I was 3 and I feel like I would let everyone around me down if I were to even MENTION quitting. Plus I feel if I quit I’ll regret it the minute I do it. Softball is also my main source of exercise and I have a slow metabolism....ugh I’d feel useless and lazy without a sport and I feel like I’d be wasting my time if I quit now and put all this work in. Please somebody help me...

If it is just lack of motivation how do I regain it? Any tips? And any extra workout plans or ways to regain my love for softball?