2nd prenatal appointment

Lacey • Mommy to an Angel 1.14.16; wife 9.24.16; rainbow baby 4.4.17 && Baby #3 Due 4.28.20
Alright ladies... I had my 2nd prenatal appointment with my family doctor today and everything is good as of now. His only concern was that I'm not exercising and that I should be to help make labour and delivery a little easier. I've gained about 6lbs in the last month. I am 10 weeks 2 days today. I'm feeling very overwhelmed and I just don't want to exercise even though I know I should. Any words of wisdom and suggestions that might help this lazy mom to be!?