What money management rules do you have set in your trading plan that you follow to stop trading for the day?
As other have said, it is is a matter of why there are losses and why are you stopping. If you can drill down into the reason that is a good start.
To wit, I had 3 or 4 bad things that were hurting monthly performance. So I created a set of "meters" that evaluate my trades. When the meters indicate bad things, I stop the current session by actually closing the trading platform and go do ANYTHING else for at least 10-15 minutes. My losses are recorded and I start a new "set" of trades. I don't have any thing to "revenge" for and start with a clean slate. Likewise my meters can kick me out for doing very well and hitting goal. Again, I close things up and walk away. I return later as a "new set", just as cautious, aggressive and calculated. (I am not a pro, just competing with them on ES)
Some days I will do 3-4 sets, like today (actually 7 sets today hit goal). Normally I go one set, but this volatility (VIX > 25) allows for more action, e.g. mid day. It allows me to keep the money issue as a side line, and concentrate on the trades by breaking down the trades into manageable sets.
An analogy is driving. Driving 2-3 hours is easy. 14 straight for only gas is hard, especially in bad weather. So drive 2-3 take a break, then another 2-3. You will get there safely eventually. Likewise you can consistently string together trades excellently executed according to your plan, stop, take a break, and then go again with another string.
Simply put, take a break, go back to basics. No need to be superman non-stop trading, nor a newbie, who thinks they are missing out on a trade opportunity. The market will be here and more opportunities will arise so take advantage of that reality in your plan.
PS: This all assumes that "2% loss risk" is being offset by winners (Size and/or frequency) so there is a positive system. If there is not, or it is unverified over a long period (at least 30 "session"), that is a much larger fish to fry.
PPS: this is from the ET archive:
Scalping and Analysing your trades. A true scalpers lineout. I started with this concept and modified it for my usage.
Hope this helps.