1. You are silent on the gravity or intensity of mental harassment. In marriage initial frictions re there which with passing of time fades away. Staying away from your husband is likely to end the marriage with each passing day.
2. Nobody can lawfully take away the child from you . If someone does that he may be criminally prosecuted for kidnapping the child. You may inform the local police about such threats.
3. I would suggest you to talk to your husband privately to iron out the differences amicably.