Family is there for you to support you, nothing to be ashamed of. If you are in need of a financial help, ask for it. They are not going to offer it before you ask due to respect to you and your husband and the believe he can provide for you. Don't be ashamed, we all face situations. Ask your family for help, they will be happy to prvide it for you.
Any family member that care deeply about you will surely want to help you out in your times of need. You do not need to be embarrassed, because we are all humans and sometimes life does not turn out the way we thought it would be. It is not a competition about who has the best life. Your family members would be concerned and do their best for you.
If you're certain that your family member can give you objective advice on your marriage problems, then feel free to ask them. It would be wise to consult someone who already has years of experience in the marriage and is in a healthy marriage him or herself. One thing to note however, is that family members can be rather biased in their advice because they are ver close to you and thus might emphatize with you more. In this case, getting a professional for help would be more beneficial.
Some family members may have wonderful advice to offer you in regards to marriage, and seeking input from one’s elders is a time-honored tradition. That said, it’s also wise also to be cautious when asking for help from a family member. Remember that they are very close to you and will instinctively want to take your side. While the validation may feel good, their involvement may not help the relationship in the long run. Consider defining some limits and boundaries before asking for advice, so that your family remembers to respect your marriage and the importance of helping, rather than hurting, the relationship.