My ear fullness started about 1.5 months in, along with pulsatile tinnitus. Given you have had a cold recently, it could be ETD. I have no idea what's causing mine.
Taking Clindamycin. T did have some improvement Im not sure if it's from the antibiotic, DMX cold medicine or learning to manage it better by avoiding constant sounds. Will report back in a week or so.
I think anxiety and stress was doing it to me originally .. it seems to have gone tonight my tinnitus is very low almost back to baseline.. only thing i did was started taking my NAC and Acetyl l carnitine 3 times a day together yesterday.. since i was only taking it nac in morning and night with the Acetyl l carnitine once in afternoon
EDIT: I have hearing loss.