Praise be to Allah.
We praise Allah for opening your heart to Islam and filling it with faith; we ask Him to make you steadfast and to help and guide you.
You are a Muslim now and you do not need to repeat the Shahaadah. Even if we assume that the first time you said it, it was not with full conviction of Islam, there is no doubt that you have said it many times after you became fully convinced and accepted this great religion.
Your marriage that was done in January 2010 is a valid marriage.
We advise you to pray a great deal and read Qur’aan, because these are among the greatest means of finding peace of mind. You should also try to convince your husband of the importance of going to the mosque and meeting Muslim women and looking for righteous friends who can help you in righteousness and good. The husband does not have the right to prevent his wife if she asks him for permission to go to the mosque, so long as she goes out observing proper etiquette and shar‘i rulings, and her going out does not result in any negative consequences or fitnah (temptation). That is because of the report narrated by al-Bukhaari (900) and Muslim (442), according to which the Prophet (blessings and peace of Allah be upon him) said: “Do not prevent the female slaves of Allah from going to the mosques of Allah.”
For more details concerning that please see the answer to question no. 49898.
You have done well to join a class on the Internet to study tajweed, fiqh and Islamic history. This is making good use of time and acquiring knowledge by means of which Allah raises people in status and makes their deeds weigh heavily in the Balance.
You should remember that the believer will not be free of trials which will erase his sins and raise him in status. So be patient and seek reward with Allah, because what is with Allah of joy and blessing is worth that and more.
We ask Allah to take away your pain and relieve you of distress, and to grant you happiness in this world and the Hereafter.
And Allah knows best.