Irecentlygo somethingstuck deep in my sinus cavity about a year ago do u think if it pushed down far enough it could do damage and cause a blood clot?

Foreign body. The foreign body may cause damage, but it is doubtful that it would cause a blood clot. Seek help from an ear nose and throat specialist.
Foreign body nose. You definitely should not try to push a foreign body around in your nose. See a doctor for a diagnosis, and if you have a foreign body, the doctor will advise you on what needs to be done to help you with the problem.