I did the same thing as yesterday. I couldn't go any further. I was looking at the street signs this time and it was 7th street when my legs started straining. I only live on 3rd so that's only a few blocks lol.
Anyway, I brought my step counter this time because it has a stop watch on it and I did 14 minutes total. And I was in the wrong gear by the way. That's why my legs are struggling to keep me standing up when I get up. When I realized the lower gear was a asset I kept it. So tomorrow morning when I go out the bike will be in the right gear and I won't have to struggle to ride and maybe, just maybe, I can go further.