The emphasis on the minor keeps the mood towards negative emotions as well as the tension in the progression, but the lyrics may be cathartic in nature.
First 2 thoughts: 1 gothic; 2 Metalica as part of a slower section
so you could do some word association around gothic and include Google image searches for gothic for sensory details
For other sources of inspiration, browse Edgar Allen Poe’s works and take on a point of view from describing the character’s summation of a situation pre/post climax to the story plot
Musically, this motif is long enough, so you want to now work on the contrast section; replace long with short; slow with fast…and as it sounds like a verse section, figure your lyrical and musical hook for the chorus (your big picture idea said with your unique voice)
This may sound too prescriptive, but I find going through a system of sorts makes the moments for aha possible.
Also, consider working through the process before bedtime, or nap time and be aware of your “shower thoughts” or first ideas as that is your sub-conscious working while you’ve been asleep. Even if you start thinking of other songs, don’t dismiss it. It may be your sub-conscious pulling out a chord progression or thought from another song you can use in part.