Answer: It's impossible to say for sure what you have. My first guess would be some type of hoya. These plants have waxy leaves and flowers. The star-shaped flowers are borne in clusters, and are sometimes multicolored as you describe. The flowers are usually quite fragrant, and the leaves are oval shaped, and they are commonly grown as houseplants.
You might enjoy visiting Logee Greenhouses' web site (www.logees.com). They carry a large selection of flowering houseplants and tropical plants, and you might recognize something there.
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