If you came to USA on a visa, were inspected and admitted - you might be eligible to apply for a green card/permanent residency trough adjustment of status. In such a case, you might be able to adjust status without having to go back to your home country to apply for a visa. You need to make sure that you properly apply for adjustment AND that you are not inadmissible.

If you’d like to schedule a telephone or email legal consultation, need legal advice or help, please let me know and I’d be glad to help you. I am an immigration attorney and offer confidential consultations and legal help in matters of the U.S.A. federal immigration law to clients from all 50 States and internationally. Please email your inquiries at Attorney @law-visa-usa.com and I’ll send you a Questionnaire. Office Telephone line is 1-402-210-2040 (please EMAIL first to schedule a consultation appointment with an attorney).

Note: The above response is provided for legal information purposes only and should not be considered a legal advice; it doesn’t create an attorney-client relationship. For more information or to schedule a consultation, please visit http://www.law-visa-usa.com/contact_us.html

From the facts you presented, your last entry to the US was legal. As such you should be able to adjust your status in the US following your marriage. It is important to review your history and documents prior to submission to USCIS. If you cannot afford to retain an attorney to represent you, at least consider retaining an attorney to review your package prior to submission to USCIS.