I need help please!!! How can I make my stool soft asap?!?

I have recently been on a new medication that causes constipation. I recently went two weeks without any bowel movement and when I finally had to go it was the most awful experience of my life!! It was so hard and so painful and I was pushing as though I was in labor. I began to sweat to the point where I was slipping off the toilet that was soaked in my sweat, I didn’t know whether to puke, shit, urinate because it felt like a combination of the thre. It felt like a huge round rock was trying to come out buy was so hard and dry It was impossible I even got desperate that I tries to pull it out myself when after feeling as though my stomach was going to burst, knives were cutting my anus, and the urge to get this thing out all that comes is a tiny little pebble. However the next day I took miralax which had me going to the bathroom within 1/2 hr which was good I was able to push our another piece but not without excruciating pain! (blood does appear when I wipe) it stung to go and really truly feels like I’m going to tear the walls of my anal hole… I cry every single time and it makes me not want to go… I stilll have the feeling to go as though there is still some more to come but I am holding it in because I am deathly afraid of the pain I will be in. I drank a 1.5 liter bottle of water hoping that will help. Please any suggestions on how to soften it NOT to make it come out I’m already good on that part. THANK YOU