It sounds like your teachers and fellow students are stepping up to help you, which is a real blessing, so just take a breath, gather yourself and be ready to accept their assistance when you need it. Recognizing when frustration is rising is not the same thing as dealing with it, but it’s a very important first step and one you seem to have in hand.
There’s no magic to changing habits: it’s a slow soak in repetition, wearing away the old and building up the new. Try to keep your calmer perspective, recognize earlier when your frustration starts to rise, make an effort to slow yourself down sooner or shake it off a bit quicker, basically just try to do a little bit better each time. And be appreciative to those who are helping you. One thing about long journeys like this is how valuable the people around you can be.