If you want to produce more milk - start pumping in between feedings. It's all supply and demand and your body does not know if it is the baby or the pump taking the milk out. So if you pump - you will produce more milk.
To keep baby awake I did what you have tried - get her in just a diaper, tickle her cheek and pat her back when she falls asleep. You can also wipe her face with a cool(not cold) washcloth before you feed her.
It is very common for babies to lose weight the first week and it also takes about 3-5 days for your milk to come in. Mine even took a little longer than that and even longer to get sufficient quantities. Your baby sounds totally normal to me but if she keeps losing weight then it would be a problem. Because my daughter lost weight at first, we supplemented her with formula for a week or so at the beginning. We used a syringe filled with formula with a tube attached - then when I breastfed my daughter we would slip the tube into her mouth and slowly eject the formula. This way she still gets your milk, learns how to latch correctly but gets the calories she needs from the formula. We only had to do it for a week so don't be sad if you have to do this. You can stop once she starts gaining and go back to exclusively breastfeeding. Best of luck.
It is concerning that at over 2 weeks of age, she has not regained her birthweight. Mlb gave you very good suggestions.
I'd also add that you probably need to see a lactation specialist, if there is one where you live. You can often find one by contacting the hospital where you gave birth. A lactation specialist might be able to check for latch issues or other problems.
First, it's common for exclusively BF babies to take up to 4wks to regain birthweight. Also, pumping is NOT a good way to estimate how much milk you are making or how much baby is getting. Baby is much more efficient than the pump. The best way to determine your output is to get (rent or go to LC's office) a very sensitive scale and weigh baby before and after feeding. And the best way to make more milk is to nurse more frequently and pump in between feedings like the pp suggested. It can be really tough, but it's so worth it! I would highly suggest trying to cut back on the formula if baby is hydrated b/c supplmenting may just hurt your supply more at this point.
For you, eating oatmeal helps. I find that 2-3 servings of rolled oats a day plus a few extra glasses of water works wondres. There's also mother's milk tea, although I've never used it. Avoid any antihistimane or other medications that "dry you out". Rest and made sure you are eating when hungry.
Don't be discouraged if you only get a tiny bit when you start to pump. I started off getting less than an ounce and within 2 weeks I was getting 3 oz and now can get 5 (and that's after feeding 4m old baby). In general, pediatricians tend to be uneducated about BF so I would definately suggest seeking assistance from an LC or local LLL leader.
continue to offer your baby the breast as often as she wants and attempt pumping between feedings. Make sure you stay well hydrated, I always kept a drink with me where ever I nursed. Check to see if the hospital in your area has a breastfeeding support group. Mine does, they had a scale to weigh the baby before and after a feeding and plenty of advise. Good Luck!