hello doctor my name is Silvia,i'm 29 years old,i have acute lower back pain,i can't sit down or rest propely,2weeks ago i notice bood i my stool,i wasn't going to toilette regulary and the blood it last for around 10 days,now it seems normal,but i still have a lots pain in my back,should i go and see my gp?also few month ago i suffer from sciatica pain i cuoldn't lift my leg i had a very slow recover,do you think is relate it too?