Why do they they happen and when? Up until the past week, I've never had any distinct or recurring HH. Before then, i've probably had 2 or 3 random video game noises. Within the last 2 WILD attempts (only one of which, i got lucid, the other one seeing as I was so unused to HH, i believed that I was in the beginning of the dream already, however, there was no dream scene and i quickly tried to create one to no prevail) I have heard voices.
The second attempt (which I just awoke from) ended with me having a bombard of voices. I was going to wake myself up but ended up trying to exaggerate the voices with resulted in the voices quietening and eventually shutting up. These voices probably happened all within one or two minutes and quickly lead into the dream.
But why HH now? Nothing has changed during my daily life that I can recall of (it's 3:37am >_>)
First WILD attempt: afternoon nap
Second WILD attempt: WBTB=30mins+

Thanks in advance~