Eating like crap. Help!

I feel so guilty. I don’t eat very healthy. I’m not eating fast food everyday but I do indulge in pasta, bread and sweets. I’m working out but I feel like indulge way too much. I’ve gained 20lbs and I’m 6 months pregnant: I’m so tired from work and stress that Ive sometimes become lazy especially at work and just order out food from near by restaurants. How do you curb your cravings. What helps ? Thank you!