Okay so I'm looking for advice from other moms and mom's to be. backstory: I'm in the army stationed…

Okay so I'm looking for advice from other moms and mom's to be. backstory: I'm in the army stationed in korea. I got pregnant during a like 3 week fling with a black hawk mechanic. he's pcsing back to the states where his 2 kids from his marriage (he's still legally married to her in the army's eyes. they don't recognize separation) are at. I'm going home on leave Wednesday and then I come back here to clear and then I fly to Germany. he asked on Sunday if I had time to talk, which I don't because of how soon I go on leave and how much stuff I have to do. I told him as much, and he started accusing me of trying to keep this baby from him, and saying he will take me to court for custody, because I wouldn't talk about its future at this second. mind you, this thing isn't due until November and he wanted to talk about things like daycare and visitation right now. when I went and saw him on Saturday to talk about this, I told him that I would send him pictures and videos and he can Skype with the kid and when I go home on leave I'll make time for him to see it and if he wants to fly to germany to see it, he absolutely can. I just don't understand why he's threatening to take my only kid from me when it hasn't even been born yet, and he's already in a custody battle for his other 2 kids from his wife.