I would highly recommend the Tarptent Rainbow (or Double Rainbow, if you'd like even more room and the option of sheltering another person).
My wife and I use a Tarptent Double Rainbow and we've been very satisfied it. It's super easy to get in and out of with the double-door side entries, and it's also fairly light at 41 ounces (2lbs. 9 oz.).
I think you can't really go wrong with either a tent from Tarptent or, if you use trekking poles, one from Six Moon Designs. With that said, there are a lot of great cottage tent makers these days, so there has never been a better time to buy a tent than now!
Good luck in your quest!
By the way, and hopefully without getting too personal, I have a suggestion I'd like to throw out there as far as the peeing at night thing goes...
My wife has been using a product called the "Go-Girl," which is basically just a small, light, inexpensive, collapsible, ergonomically-shaped silicone funnel that allows a woman to pee standing up. You can clean it with water afterwards to keep everything hygienic (although healthy urine is very nearly sterile anyway). It's very durable and should last for years and years (just like a silicone spatula!).
Anyway, my wife swears by this thing, and has repeatedly told me that it makes her backpacking experience infinitely more enjoyable. It's her self-professed favorite item in her pack, if that tells you anything.
I was thinking that you might want to give this a try if you think it might make things easier for you.
Also, I'd suggest that you consider bringing a dedicated "pee bottle" with you that you can pee into at night without ever leaving your tent. My wife can do this with ease when aided by her Go-Girl funnel. It's no problem at all, and you just dump the pee bottle out in the bushes the next morning.
As for the pee bottle itself, my wife just uses the lightest plastic water bottle she can find, just make sure it has a capacity of at least 20 ounces and that you CLEARLY LABEL it! :)
Hope that helps!