Singing the lab blues

I am having some difficulties with my project. I am in some kind of slump in which none of my experiments are working. I mean the simple PCR reaction is not working.  The cells are not proliferating fast enough. And on top of everything, I placed an order with the person in the lab who is responsible for ordering reagents and due to no fault of his own, the order did not go through. It turns out there was some kind of computer glitch that day and the email to place the order never was received by the company, but I found this out like two weeks after I requested the reagent to be ordered.  (And I thought that I gave myself enough cushion room for this by placing the order before I ran out of the supply I had in the lab.)  So, that experiment is on hold for at least a month because the reagent is made-to-order.  To top everything off, I am not getting any attention from my PI because I do not have any NEW data. Sigh. I need some encouraging words because right now, it is all bad.