Stuck at 136....trying to NOT get frustrated.

I've been stuck at 136lbs for a couple weeks now. I am trying to not get frustrated and give up but it is really really hard when i'm not seeing much by way of results. I am feeling better overall and feeling more healthy that i was before i started P90X but i it's looking like im not going to hit my gold of 120lbs at the rate that i am going. From what i have read online most women stall out from the 30-60 day range and see the most results at the end of the 90 days, the best results being at the end of 180days (meaning they do the program again a second time only taking a rest week). I missed a workout this week because i picked up an extra shift at aerie so as soon as my youngest daughter wakes up from a nap im gonna try and do BOTH workouts. arms, back and triceps AND legs and back. it's gonna be a long 2 hours. i meant to do one this morning but i was just too tired and needed a nap if i was ever going to make it through the day!