5 weeks post hysterectomy: Pink discharge now fresh bright red blood

Five weeks post op today Absolutely no discharge all day, I have done some walking today. Then come to go to bed and find bright red blood, got a vile griping pain on my right side but not enough to warrant any pain relief. Feeling much better in myself but I'm thinking I'm doing too much unwittingly. Sorry to post again but scared something's going wrong, I'm in the UK so trying to get to see a doctor can be challenging. Don't have check up until December so rely on this site x