I was in your EXACT same boat, actually.
By Day 3 I was over 1000, day 5 I was over 2000, then I started going up 1000 A DAY. We tried tweaking my meds, and then ended up just coasting for days 8-11. I got to trigger on day 11. My estrogen had finally hit a plateau and dropped slightly (but was still scary close to 6000). We triggered with 5000 hcg instead of 10000.
Since I was physically feeling fine and showing no outward signs of OHSS or high estrogen, we went ahead with the 5dt.
Just stay calm girl! I was told once my numbers hit 3000 that I needed to start the OHSS diet, high sodium, all that jazz. I'm actually still on it now because OHSS could rear it's ugly head if I get a bfp (and I'm actually showing symptoms today, so a call to the doc is in order when I get home).
DX all goes well!!