Hello Tinkerbellj
I use Sandrena and I think it's great stuff! I agree 4 mg does sound like a lot, but my gynae said some of her patients use that much, so you're not alone.
I'm using 1.75 mg and use it on my inner thighs. It's actually not a huge volume of gel and so I'm sure you could use 2 mg on each thigh? I find it's touch dry in 10 minutes but it tends to stay "tacky" up to 20, so I usually do my hair and make up as it dries. Good luck and hope you start to feel better soon.
RR xx