yep you should be ok till then, just give the leaves a good spray with water so its got plenty of moisture at the leaves and you should be ok till them, that way you know for sure if its going to work or not,
if not then cut it back as small as the other clones, maybe just a tad bigger but ive found smaller clones work best, but others argue slightly bigger clones work better.
ive even took clones and they have only been 2cm above soil level and with these ive never needed to put a dome over them as the stem cant wilt as their is very little stem to wilt, but bigger clones wilt within a few hours, so just play around and see what works out for you, i find smaller clones work better for me and i only take 1 clone now from the strains i want to clone knowing it will root with no problems,
your plant looks very healthy though, a nice colour to it, or color depending where in the world you are