I see no one has answered you and all I can tell you is my experience as a nurse. We had a patient we gave monthly Lupron injections to. This was 40 years ago(nothing to do with prostate cancer) and I no longer remember the dose. One day he came inside and had a funny gait. Told me his leg hurt. This guy rode his bicycle all over. Very active. I looked at his leg and sent him to the ER. He ended up having blood clots-2 in his leg. The psychiatrist took him off the Lupron citing that as the cause and he never had another Lupron injection.
This is something you should talk with your Dr about. Chances are it’s nothing but, if you think you might have blood clots you should be seen ASAP. I don’t want to scare you but I also don’t want a clot to break loose. They can do an easy Ultrasound and let you know. I wish you well.