too much r-134a???

converted my lude with r-134a and 1.5 cans of refrigerant. After the first can I heard the a/c pump finally turn on and cold air blew. But the psi was still not too high so I put another can in and I lost all pressure from a bottom line and now it wont hold pressure it just hisses out. Anyone know how I can get myself out of this or how screwd i am? thanks in advance.

you probably blew a hole in a line. Find the leak and start from there.