Had What We Thought was a Lipoma Removed but was a Lymphangioma, Suggestions for Removing Built-Up Fluid?

Diagnosed Lipoma (scalene neck area) had surgery 1 month ago. Immediate swelling and pain to this day. Have now seen 4 different doctors and was told yesterday it wasn't a Lipoma but a Lymphangioma with a cyst inside. The swelling and pain is because the space has filled with fluid and the doctor said he can't help me. Can't see the surgeon for another 4weeks...please advise...I don't want to stay like this. Can something be done to remove the swelling and pain. Thank you for any help.

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