I can't swim but I didn't drown..

Today, thanks to the supreme kindness of Laura and Courtney, I did my first full swim session. I used the pool at their complex and did a combo of freestyle and breast stroke for about 25 minutes. Honestly, despite the fact I've been working out 6x/week, I have never felt so out of shape. My arms ache, my lungs hurt, and I feel like a complete loser. I 'm going to go back tomorrow morning for another work out, and like with all things...this will come too.