I would need to know more specifics, but here are some general guidelines. If you received benefits after your husband's death because your children were little, then your children received survivor's benefits and you received Child in Care benefits. When your youngest child aged out of those benefits, yours stopped as well (this assumes none of your children had a disability).
Assuming you are now 60 or older and unmarried, you will have the option of collecting survivor benefits and/or your own benefits. Survivor benefits can begin at age 60, but will be reduced because you are taking them earlier than your full retirement age (FRA). Your benefits can be claimed at 62, but again will be reduced because you are taking them prior to FRA.
Both of these benefits may be available to you, but you can't collect them at the same time, they have to be coordinated. You will want to get advice from a knowledgeable planner on how to best determine which benefits you can collect and how to best coordinate them. This depends on a number of factors so it would be impossible to say what would be best without knowing all of your details.