Please help dog situation?

So i was about to go to sleep and looked at my dog , and i saw a bug and it hid so i checked her and found it i immediately thought flea i have never dealt with fleas and i combed her and she had black stuck like sand so i took it out and put coconut oil on where she had them kept checking her from 2:30am till now... show more So i was about to go to sleep and looked at my dog , and i saw a bug and it hid so i checked her and found it i immediately thought flea i have never dealt with fleas and i combed her and she had black stuck like sand so i took it out and put coconut oil on where she had them kept checking her from 2:30am till now 5:23am haven’t seen more anymore and now i’m panicking i read on google about dogs getting anemia from it so i freaked out more . please help :( thank you
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