advice?

Okay so my partner is in the Army, I'm currently 16 weeks pregnant. he's away with the army and I won't get to see him until I go into Labour. Am I wrong in thinking I can't do it? I feel as though I'm going through everything on my own, if I don't reply within seconds he's ringing me asking me what I'm doing (making sure I'm not cheating; I've never cheated in my life) If I fall asleep with my 1 year old son he doesn't like it. he goes Moody if I don't send him a naked photo, the most recent one is he started an argument because I wouldn't send a video of me playing with myself(something I've never done) if he starts an argument he turns it round on me. I feel so alone at the moment. we're constantly arguing too