All is good.
You probably have some hop floaters, that is small flakes of hops from pellets, nothing to worry about.
If the fermentation was going well at the beginning and now only few bubbles are visible it means that most of fermentation is over. Nottingham are hungry and fast yeast.
All is good.
You have fermentation going on.
You have yeast cake at the bottom.
Looks like beer in making.
Smells like beer in making.
Tastes like beer in making.
I would guess that you are making beer.
No infection.
Now just leave it be and relax.
Change the ice bottles from time to time (without stressing about a degree ot two either way, critical first few days are over).
Fermentation will finish, maybe it will reach 1.014 maybe a bit above.
Yeast, cloudy stuff and most of hop pieces will drop down (you may have some hop floaters remaining), Notthingham flocculates very well (drops suspended pieces down).
Let the yeast just do it's thing.
It has only been 4 or 5 days.
After 10 days you may slow down with your ice bottles and let it warm up to 20-21C
Taste from time to time.
At the end of 2 weeks bottle it.
It will be a bit cloudy at bottling, it will take about 2 weeks to carbonate and clear.
It will taste very different from commercial beer.
To fill the time start planning next brew.