Hajj is obligatory once in a lifetime. If a person has the means to offer Hajj, he/she should carry it out as soon as possible. One is not advised to delay offering Hajj under any pretext, keeping in mind the fact that Hajj is one of the pillars of Islam. The Prophet (peace and blessings be upon him) said, “Islam is built upon five pillars: testifying that there is no true god except Allah and that Muhammad is the Messenger of Allah, performing Prayer, paying the Zakah, making the pilgrimage to the Sacred House (Hajj), and fasting the month of Ramadan.” (Reported by Al-Bukhari).
Moreover, it should be clear that a widow can perform Hajj along with any one of her mahrams. If she cannot find a mahram, she is also allowed to travel for Hajj along with a trustworthy group of Muslim men and women if her security is guaranteed and the road is safe.
Finally, we ask Allah Almighty to reward you and grant you Hajj Mabrur (the one accepted by Allah).
Allah Almighty knows best.