arduous pack test HELP

i’ll be taking the arduous pack test on april 4 2025 and i am desperately needing help reaching my target. i probably have bad form or just ill-informed on techniques which is probs contributing to my problems and ive never worked out to this capacity until recently. i been practicing with a 45 lb pack on a treadmill but im just convinced the treadmills in my gym are not accurate when they report the distance traveled or MPH since my garmin watch tells me different figures so it is hard to know which display to trust and base my progress off of. I can make the time cut just fine without the pack weight but that doesn’t even matter since i have yet to even finish the full test with the weighted pack. i can get about halfway thru before i have to pull the plug and stop when i happen to be wearing the vest. it makes me nervous to know im 23(F) and in great health and live an active lifestyle so there is no reason for me not to pass on my 1st try. there are a lot of people including myself who are counting on me to pass. If i don’t pass i won’t be able to achieve my dreams during such a critical time in my life and i fear being a disappointment and not being taken seriously by those who are more experienced/those who have encouraged me to get this far/those who have provided me opportunities to even have this chance in the first place. please please help. i have to make it across the finish line in time and im willing to sacrifice just about anything to make this happen.