dowers rights to property

i married my husband 6 years ago and he owned a home. he refinanced after we married but i was not included on any documents. i invested significant money into his home for renovations however. two years later we bought another home together. we used equity from his home to purchase the new home with the agreement that he would sell his home and pay off the equity loan. he unilaterally changed his mind and did not sell his home. after 3.5 years we are now planning to get divorced. we both have paid on the equity loan. i need to know what if anything i am entitled to from his house (dowers rights, etc.). the equity loan was equal to what i invested in his house. i was in process to refinance our current house in my name but he is blocking it because he won't sign off on the dowers rights or quit claim unless i pay him out on the equity loan.