Constant Bowel Movement. Please help.

I am 28 years old. and I had my hemorrhoids crony surgery 3 days back. I am pain, antibiotic, medication and stool softener (milk of magnesia). I get this constant Bowel Movement and feel like in pressure to pass stool, but When I go to the toilet, I sit for 10-15 minutes and nothing comes out. I am passing stool once or twice in a day, but in small quantity and I keep feeling this pressure like my anus is going to blast with stool(literally that feeling).. But nothing comes out most of the times. I am also having a hard time passing urine. Its like passing urine is out of my control and it comes out when I have a successful stool pass:( Kindly help. My Dr. Says its normal but Its very painful experience and I am really scared as to how many days it will take to get back to normal. Please help. Thank You!