Can I safely (and slowly) stretch with these?

I got these 5g weighted hangers because my left lobe has been stuck at 5g for half a year, while I've been able to size up my right by .5mm already (so they're at 4g.)

I figured a weighted hanger would work to help my left lobe stretch up with my right, is this actually a good idea?

Second question, can I sleep with these in? They're not that heavy and I don't move around a lot when I sleep, should it be okay or should I play it safe and put back in my single flare glass plug that's also 5g?

Extra info: They're from Bodyartforms, who I've gone through with all my stretching material in the past. I've stretched with single flair glass plugs all the way up to this point. The material of these hangers is stainless steel, and my lobes have fully healed since my initial stretch to this size.