It is the sole responsibility of the husband to provide for his wife and children, furthermore considering your health condition, nurturing of the children and the unavoidable challenges that face one in the working environment it will be correct for you to refuse to continue with your job.

Islam has very clearly explained the rights and responsibilities of every individual. Men for example, are to take care of the needs of their families’ food, shelter, clothing etc. Women are required to stay in their homes, look after the property and wealth of their husband, take care of their children and remain chaste. They should not demand from their husbands more than what they can afford nor should they disobey them keeping in mind the commandments of almighty Allah Ta`la. By doing so they will earn their Jannah.

You should explain to your husband the difficulties you are experiencing, the importance of correct upbringing of the children and having them to enjoy motherly care and attention. He should also understand the harmful and challenging working environment and above all it is the command of
Allah Ta`la that women should remain indoors. 

If this does not prove beneficial then you would have to approach an elderly family member of his or an Aalim of the area that can discuss with him and solve the issue. By you encouraging and making it easy for him to spend time in the company of Ulama, listen to talks of Deen and go out in Jamaat this will create within him the understanding and desire of giving preference to Deen over amassing wealth.

Every condition is from Allah Ta`la and can be solved only through His will, thus continues sincere Dua is of utmost importance and will surely not go unheard in the court of Allah Ta`la.