I went ahead and purchased some quickfix with overnight shipping. I couldnt find the 3oz bottle anywhere so I purchased the 2oz, I hope that will be enough for the test. I am going to use the sub, but now am a little nervous if once I come out she asks for more urine. If she does what should I do then.
For starters, dont be nervous at all. You keep a firm stance and inform the collector thats all the sample you were able to void.

2 ounces is enough for any U/A. Some collectors may ask for more, only to dump the excess after splitting/tranferring into vials for processing. But if 2 oz is all the donor can submit, the collector has to accept it.