NEED ADVICE! To Child Support Or Not..?

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Hey ladies!!!! So... you all are the ONLY people I'm 100% honest with about my feelings, moods & my pregnancy. As far as anyone else knows... they probably think I'm in a happily committed relationship which is far from but I like to keep my business extremly private so it feels really good to be REAL with you all. So... with that being said... tomorrow, I plan on going to the child support office and starting the process.. my child's father and I don't speak at all and a few days ago I asked him a simple question & I have yet to recieve a response. I'm afraid he might try to move away somewhere & he NEEDS TO start putting in money towards our child, he's not willing to be a father but he WILL financially help me.. that's not negotiable & the last time we spoke, that's exactly what I said so I'm afraid he might try to disappear. Is it too early, being that I'm 18weeks and 2 days... what should I do? How should I go about this ladies??? Help & advice is needed! ❤