Capital One and Discover completed their merger on May 18. Discover what financial professionals say you should do to keep your money secure.

Federal regulators approved Capital One's $35.3 billion acquisition of Discover Financial Services earlier this year despite opposition from consumer advocates and some top Democrats, who cited concerns about reduced competition, financial stability and potential harm to low-income consumers and those with poor credit scores.

Capital One finalized its deal to acquire Discover on May 18, approximately 15 months after the company first announced the merger. Capital One is adding former members of Discover’s Board of Directors to positions on its board.