hang in there, dont quit, its only bad for the first two weeks as you work each muscle group, it does get better if you keep at it, you wont be sorry you did, i am so thrilled with my loose skin results due to exercising, it beats going for skin surgery any day, that was my motivation, results without surgery, but then i liked it so much i have gone into bodybuilding
it does get easier, that is all about i can tell you...i dont like warm baths and such so i just whined it out and kept going
so proud of you for starting with a trainer, you will be so glad you did, its great to have some direction