Desperate, Severe RLS

I've been suffering from severe RLS (restless leg syndrome) symptoms for the past 12+ hrs. And it is still lingering in my left leg. (Things I've tried in the past 12hrs include: Hot bath, cold compress, compression stockings, Tramodol, Loratabs, Flexiril, Folic acid, club soda, Gatorade, water, sex, exercise and even Ambien last night just for sleep.

A friend has offered a small piece of a THC cookie that was baked around August time frame. And I've heard it can help. But I have a urine test for PM on the 19th (today is the 11th. And it's a simple complex test but they also send it off for further testing in a lab.)

I am desperate at this point to give it a try to make the RLS stop!! Do you think I will be fine in the time given before my test or would I have to take Niacin? (I went on a family trip to CO in June and took a few hits off a J. Then had a PM test and took the Niacin a day before to flush my system since an at home test was still +. And passed that test.)

To give more info..
I rarely "blaze".. Maybe 2-3times a year. Last ingestion was June, inhaled.
I am 5'4 and barely 100lbs (super fast metabolism, underweight with barely any fat content)
RX Medications include:
Loratabs 10mg (qid)
Adderall 5mg (bid)
Ambien 10mg
Reglan 10mg (prn)
Flexiril 10mg (prn)
Metronidazole 500mg (bid)

Any information, alternatives or advice is appreciated!!

A small amount of a cookie now will not be a problem. Within a week you could have trouble. Probably not with just a small amount like that. There is plenty of info on the web about how to mask cannabis but it sounds like you may just need to test it out now and then wait until after your drug test to be safe before you do anything else. Cheers. Drinking a lot of water can help as can cranberry juice or pills

how did this go down?