You can review the information available at the Social Security Administration's website ( www.ssa.gov ) to see whether you, your son, or both may be eligible to benefits based on the earnings of the deceased.
Applying for benefits with the SSA is free. You may be able to apply online. There may also be a local SSA where you can go and apply. (You can find the address for the local office at the website.)
Whether either of you is eligible depends on facts missing from your post.