Hey, i'm sorry to hear about your situation, it must be difficult for you. I know what you're going through, i've lost quite a bit of weight recently and I struggle emotionally as my boyfriend lives far away and I only see him about once a month. I told my midwife about the amount I cry and how stressful I find it, and she said not to worry too much, most of it is just hormones working overtime.
Make sure you eat well and look after your body, and try to relax.. Spend time with friends, and do stuff you enjoy.. Your body will produce happy hormones and the baby will benefit from it. Take care of yourself.. I hope you feel better soon =)