As of this moment, USCIS hasn't updated their website with cap count till last Friday. Once that is out you'll figure out whether you could get inside the cap or not.
USCIS Cap Count
You have mentioned that you are "planning to apply for H1B today" - has your employer got LCA certified for you? If not, that process itself might take 5-10 days, at least, and hence the possibility for you to be inside the cap is highly unlikely.