10 Days you say? that's not just a miniSD, that's already a regular SD, considering that 9 is generally the most common length (since regular MWF training means you stop on a friday and start monday after the followign week).
Hmmm... I remember that after proper SD, I suddenly find even the middle of the 10's challenging. I would suggest that you just restart the cycle in case you can't lift the 5's. But don't start with the 15's, you'd just waste the deconditioning you already got (after all, your joints were hardly strained last time, I assume, since you never got to the really heavy weights). Start with the 10's again, that's just like starting another cycle without the 15's in order to take advantage of your 10-day SD.
However, just like what Totentanz said, if you can lift the 5's and you think you won't have a problem with that, go ahead and just start the 5's. But so as not to waste the deconditioning you already got, you really have to extend the cycle a little longer.
Another thing you can do would be to do the 5's, but start with a lower weight instead of the weight you scheduled for the first 5's workout. The idea would be to still do 5 reps per set, but you extend the 5's workout by one week, thie first week being the "extension", where you use a load similar perhaps to the last week of 10's (or something else; the point is just to use lower weights than the first week of 5's, and make the progression continuous and gradual). This is to make sure you don't go too heavy immediately in case you can't make it because of your accidental SD, all the while still gaining possibly more significant hypertrophy than had you started the cycle with a much lower weight.
Just choose which one you think is more suited for you, maintain a proper diet, get enough rest, and you'll get good gains for this cycle.
Regards, hope that helps.
-JV