Tips for Handling long distance with your sailor partner during pregnancy. Please!!

My partner is a Sailor in the Merchant Navy which means he's away for 6 months. I'm currently 3 months pregnant and he left a few days ago. I'm way too attached to my partner. I live with my in-laws and not having him with me or in our room bothers me too much. I know it's not good for me or my baby. But I can't stop feeling so panicky and anxious and I keep craving his presence. I miss him, I miss being close to him. I develop body pains because of this anxiety. Please help!!