When should pain subside from a Tummy Tuck? Are essential oils okay to use on a incision? If so, when?

I had a tummy tuck w/ hernia and muscle repair about 2.5 weeks ago. I still have a lot pain when I move around. When can I expect the pain to subside? When will I be able to sleep in bed? I've been sleeping in a recliner with pillows, it hurts to lay in bed (even w/ extra pillows). Can I use the essential oils of lavender, frankincense, white fir, & helichrysum, along with vitamin e, and coconut oil on the incision 3 weeks post-op? I've read that they will help with healing and lessen the scar.