Severe constipation, really painful

First time poster, please excuse me if I ramble! Sometime in 2011/2012 I had my gallbladder removed, originally it was meant to be keyhole surgery but they perforated my colon so it was quickly changed to open surgery. The result being I spent 3 days in ITU and another 4 in the high dependency unit and 4 days on a normal ward before being sent home. My bowel movements were so normal I could give you exact times when I would need to go to the loo (1st thing am, 2nd time before bed). Since having my gallbladder removed I have suffered on and off with constipation, but this time round is really brutal, my last bowel movement was Thursday night (it's now Monday morning!!). I am so sore to a point where sitting down is also painful. I eat a healthy diet but I have to limit my intake of green leafy veg as I'm on warfarin for life, I eat veg everyday, I snack on fruit during the day, I drink lots of water and plenty of fresh fruit juice (also on water tablets). I also have lipedema which is abnormal fat cells, so my legs and upper arms (and my backside) are huge compared to the rest of my body. Two weeks ago I had my bowel screening kit from the NHS the results came back all clear, so I am certain that after the gallbladder op went wrong this is what has caused my constipation issues, I am not as mobile as I would like to be because having lipedema has impacted on my walking which is why I eat healthy. Normally senna cot works really well for me but I am beginning to wonder if my body has become (for the want of a better word) used this? If anyone has any advice to offer I would greatly appreciate it, so sorry for rambling on and on.....I have spoken to my gp about this but he always tells me I suffer from constipation because I am overweight!!