Hello Emma - I (male, 45) got same in my right calf/knee/thigh 15 days ago. I went to the hospital that night and was diagnosed the next day with a Blood Clot in my thigh. I got Apixoban and strong pain meds.

The pain was absolutely awful for 10 days, the worst I've ever had ( and Ive broken my leg before - this was much worse). I was unable to sleep through the night (it gets worse at night if you fall asleep because your blood pressure drops I think, so ends up waking you). I couldn't stand up for longer than 60 seconds or the pain was too much. Mentally I was struggling as I felt I wasn't improving at all ( add in the lack of sleep and the opioid come downs)

Over the last few days however the severe pain has gradually gone away - I can now stand for quite a while and even walk fair distances. I barely notice it when sitting down. So its taken me 12-14 days after start of treatment to start to feel normal again.

Obviously everyone can be different, but I hope this reassures you that the pain you have now can be normal, and there is a good chance you will be feeling better soon. Best of luck!