Pace Maker and Blood Cot

My husband has had Atrial Fibrilation for years where it would bother him for 24 hours and then settle down. About one week ago it started and wouldn't go away. His heart beat would jump around between 40 and 120. He went to the doctor and he suggested having an Ablation done. The next night his heart went really crazy so at 3 am Saturday he had me take him to the ER. The doctor told him to see the Cardiologoist that day. He was taken by Ambulance to the hospital in Murray. The Cardiologoist told him they were putting a pace maker in on Monday. He can't use his left arm for 6 days after that he can move it. He just can't lift if over his head. It will take 8 weeks to recover. Sunday night his calf hurt and he thought it was a charlie horse. It was uncomfortable to walk. We came home on Tuesday. The surgery went well and he had no pain with it. Wednesday morning he got this pain in his calf that brought tears to his eyes. He couldn't walk on that leg. He had me call the ambulance to transport him to the ER. They did an Ultra Sound and found out he has a blood clot. I have to give him a shot in his stomach every day for 6 days. This will make the clot adhere to the wall of the vein so that it doesn't move. He also has to take a blood thinner. You know how it's said things come in 3's, well I'm hoping that doesn't happen. I don't like giving shots because I don't like needles but we both have survived the first one. I'm lucky in that he is not a demanding patient!