My Invisalign trays don't fit properly. Is it okay? (Photo)

I'm on my Invisalign tray one and I'm supposed to change trays on Friday. But I'm scared that the trays I'm currently wearing don't fit properly.. The tray dosen't go all the way down everywhere. My orthodontist didn't really say anything about how they were supposed to fit so I'm not sure if it's okey that they don't go all the way down? I have been using the chewies but the first couple of days I couldn't bite down properly on my front teeth because they were so sore.