The paper is loose in the hydrometer? That sounds weird.
Was this an extract batch? Was it a kit? If so, whatever the kit said the OG would be is likely close. Even still, if it was a Wyeast pack, no matter how large it was, there are 100 billion cells and that isn't quite enough.
If you go to this site posted below, even if you never make a starter, you can tell how many packets of yeast you need to achieve proper pitch rate.
http://www.yeastcalculator.com/
So for example, using your 1.090 number that was originally given, you need 306 billion cells. If you did use a wyeast smack pack, you need 3 packs or a starter before you brew.
boydster is correct, if you can get to another pack of yeast fast, do it. If not, let it ride. What was the beer you brewed?