Man, rough start.
I woke up one morning and the thing fell over entirely, I think due to lack of airflow and too much water, "damping off" is the term I learned this week, what I think is going on.
I transplanted it, twice actually, once when it was still upright but leggy, and then after it fell over, setting it deeper each time.
When it fell I propped it up with a skewer and a very loose twist-tie and it has actually done ok. I buried the dark, pinched looking stem, hoping it doesn't progress
pray for seedling