im using 23g 1 in pins and have done many quad injections but this morning when asperating i sucked in some fat or something that looked like fat whats the deal. can i still use whats in the syringe if i get rid of the fat and also is there some explanation why this would all of a sudden occur because i took it out changed pins and the same thing happened again. i know im in plenty deep because ive done many injs in that spot before.