Hello
Butterfly 
Lovely avatar and welcome to BoneSmart. It's a wonderful forum and you will get all the help, support, advice, laughs and encouragement you need to get through this.
I'm sorry to hear that you're facing surgery but we're all apprehensive about it - you have lots of company with that feeling! It's very normal to be anxious. Read as much as you can and you'll learn a lot and feel less in the dark about all of it.
I was terrified of surgery, but realized I had no other option, so...it had to be done. I chose anterior for the reasons you said, supposedly quicker recovery, less restrictions, I knew a highly regarded surgeon and a few of his patients. I also had both hips done at once. My recovery has not been ideal, but that's just mine. Whether it's because I did both at once, had anterior approach, some other reason, or a combination of all reasons, I don't know. A few others who had bilateral did very well - Gershom, smrt2run and cndydutch. Check out their threads. Also
SeaSiren, who is currently still recovering, is a bilateral.
I personally felt that having both done at the same time was very hard on me - I was surprised at how weak and tired I was afterward. I've gained my strength back now, though, but it's tough having no good leg to help when they're both operated on at the same time. I still have pain and the OS feels it's 'soft tissue inflammation.'
The positive with bilateral, I was told by a PT, (I didn't read this and an MD didn't tell me) is that there's less chance of a leg length difference when the OS is doing both, but I would think with a good OS the chances of that happening aren't that great. And with doing both at once, you have 1 surgery and 1 recovery. Truthfully, it's not easy, though.
Whether you do both hips with one surgery, or not, is a decision you can make with your OS when you see him - some won't do both at once, while others will.
Whether you do anterior or posterior approach is another decision, usually you go with the OS on that. One fellow who is having his hips done has posted some links on the difference between the two approaches. Check out
bsilvers thread if you want to read them.
Also, you should be able to get help with the pain. Get some ice gel paks and use them as much as you can where you have pain. And I think staying off of your hips whenever possible is a good idea. A hot bath or shower can help for a time. Some people use the pain/arthritis creams at the drugstore, I didn't find them too helpful, though.
I won't recommend any particular meds, but many people will use the over-the-counter pain control meds or anitinflammatories as directed, if it's medically ok for you and it's ok with your primary doc, or OS. Or you can call your primary and see if he can prescribe something for you, or ask the OS when you see him for a med, to tide you over til surgery. I don't think you should suffer if you don't have to. I used meds pre-op - couldn't have made it without them.
I hope this isn't too much information, and that it helps some. Good luck and keep us posted!

Don't be afraid to ask questions, we're more than glad to help.