Sorry for your loss.
Her will must be filed at the county courthouse.
You can check the public records.
If it has not been filed-hire an attorney to send a demand letter that the will be filed.
Once filed-you can tell if you were left anything.
The answer given does not imply that an attorney-client relationship has been established and your best course of action is to have legal representation in this matter.
You should re-post your question using St. Louis as the city instead of Houston. Probate and inheritance laws vary greatly from state to state.
DISCLAIMER: This is not specific legal advice and does not establish an attorney/client relationship.