Relationship advice please!

So ever since I got pregnant I've been feeling less and less... and less attractive. The horrible acne that come back with a vengeance every time I attempt to clear it, to feeling like a fat cow with terrible hair! My fiance is wonderful with trying to keep my spirits up telling me he thinks I'm prettier than ever when I'm feeling down. Offers to take me shopping or brings home icecream. I just feel like he's growing tired of picking me back up and things... are getting boring for him. What can I do to spice things up again to show him I appreciate everything he does for me but also make me feel sexy again?