Medications for anxiety do work, but they should not be taken long term. And they do not cure your anxiety- you'll be doing nothing to treat the underlying problem. Taken long term, anti-anxiety meds can actually cause an increase in anxiety and panic. And they can be VERY addictive. Its best to use them for a short time, and only when needed- not long term, or as a daily med that you take the same time every day.
Advice like this, on a message board with no sources whatsoever, should be taken with a huge grain of salt. My research of the brain and how anti-anxiety medicines work in the brain do not support all of these statements---these are really things to be discussed with a trained psychiatrist...
I think the confusion here is about the type of anti-anxiety medication... things like valium and ativan are addictive and can make depression/anxiety worse over time if they are abused (they are narcotics) Medications that are intended for daily use, the ones that are also used in treating depression, are not associated with these risks.
OP, to get through the next few days, do you have any hobbies that could help keep your mind occupied? I have crocheted/done counted cross-stitch to help cope... I think the repetitive motions help somehow, I don't know... what have your mother and sister done to treat their anxiety? If they've taken medications, get the list of what didn't work/what worked for them, it may help the doctor narrow down the right medication for you.