Miscarriage and trying to lose weight

I lost my little girl at 23 weeks. I already got stretch marks and gained about 14 pounds from carrying her. Stretch marks run in my family when pregnant. Anyway, I feel like a fat slob with these stretch marks, and I feel huge. It's summer and i want to go to the pool and tan and swim. The problem is, i don't feel comfortable wearing a 2 piece swim suit because of the stretch marks I already got :( 
Is there an effective way to lose the weight that I gained from being pregnant?.. I don't want to spend all summer trying to get a summer body, by just losing only like 10 pounds in 2 months. Then, summer will be over. Does anyone have advice? :(