Mental break through

Last night after my 17.5 mile run at a decent pace, I felt I was going to be struggling at today's 4 km swim.  I considered swimming with a pull buoy to take the pressure off my legs but having slept in compression clothing I woke up feeling surprisingly fresh so I didn't  bother.
So I tackled the longest distance I had ever swan, 4km.  It's fair to say it was mind numbing but after just over 1km my coach got in behind me so there was no way I wasn't going to complete it.  Your mind wanders and you have to give it positive things to think about.  In the end I completed it in 1 hr 27 mins and was really pleased.  My coaches husband who is also a coach had been in the same lane and he mention how fast (for me) I was swimming compared to what I used to be like.  So the hard work has paid off but today was really a mental exercise in believing that my training has "raised the bar" and what I previously would have though of as impossible is perfectly achievable with the right mindset.  I'm having a day off tomorrow, then a 90 mile bike ride and then I enter a recovery week where my training reduces but I train every day.  So all that's left for me to say is have a wonderful Easter break.