No... Higher gravity wort would help next time.. I just did a cream ale all grain fell short from target gravity and a very short primary fermenting 4 days still got 3.2% better luck next batch.
Get a co2 tank trade your other tank if you can I got a 15 lbs. Tank for 43.00 at my local welding shop. I Owen it now and it is only 12.00 to refill it. I got a tap kit with everything needed from homebrew stuff for 128.00 quick shipping!! Good luck!!