mc sadness

So I found out I was preggers right before my husband has shipped out, he was going to be gone for 13 weeks. I was already over a month when I found out, I had spotted so I thought it was my period but I soon found out that wasn't the case. I was so excited to have this little bundle of joy to keep me positive and motivated during his absence. 
Unfortunately at 17 weeks I found out I mc. I'd gained some weight already, a little over 15 lbs.....It's been 4 months since and I'm so unmotivated to work it off. I want it gone and I know what to do but I'm just so numb. Every morning I wake up and see myself. The little stretch marks that began to surface and the weight I gained were beautiful signs of what was happening inside me. And that was taken from me. 😞 We are ttc again, which is hard since we go weeks-months being apart since he's training a lot. I won't be seeing him more than every few weekends for the next two- three months so I figured it's the perfect time for me to get healthy again and get to a comfortable weight. I can't seem to find that gumtion to actually get out there and do it. To overcome this sadness. 
I've been trying different methods like meditation, yoga, long walks, self reflection, ect. but nothing seems to help consistently. What sucks is I know I can do it, I know how to do it, I just don't know how to motivate myself to.