Finger got stuck in a car door?

Super long story but a very nice couple helped me get the finger out. Thing is, the base of my finger is now a dark purple and there's this lump of clotted blood on the top part of it. Should I call an ambulance? I've been getting told different things by different people- put ice on it, don't get it wet, wrap it etc. I don't know what to do and my thumb is swollen and throbbing
Finger got stuck in a car door?
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