Strange smell off my bud

Hey guys, relative newbie here. I harvested a plant 2 weeks ago and have been drying and curing it. During veg and at the start of flower I used BioBizz Fish Emulsion nutes. I gave it water only for around 3-4 weeks before I harvested as I couldn't get any more suitable nutes for flower. I didnt do a "proper" flush where you run lots of water through the soil as I was using crappy soil that traps lots of water and I was afraid I might over water it.

Now that my bud is curing in jars I notice a strange smell from the buds. Its hard to describe, I don't think it smells like fish emulsion. Any idea what it might be? do you think my bud isn't properly flushed, how can I tell?

Ty for reading.

Flushing has nothing to do with the flavor of your buds.

https://www.rollitup.org/t/the-truth-about-flushing.409622/

Yeah that was my understanding, thank you. The buds were hung up to dry for a week and have now been curing for a week but still have the strange smell. Do you think the strange smell will go away once I cure longer? it smells nothing like the buds did on the plant. I'm about to harvest a second plant and I'm worried the same thing could happen to it too.

Might help if you described the smell. If it is grasslike or heylike, totally normal and will go away with cure.