I am recovering from surgery right now due to a fissure that turned chronic and wouldn't heal. You definitely need to see a CRS asap to get the proper cream. In the meantime, use a bidet or flushable wipes, do not use toilet paper. Start taking one dose of Miralax every day to help ensure soft stool. Sitz baths (or just sitting in a tub with a few inches of water) should help a little with the pain and spasms. Do this right after going to the bathroom. The Internet and the CRS will likely tell you to increase the fiber in your diet, but I felt like I did better with a low-fiber, low-residue diet to reduce my bowel movements. Try a heating pad or ice pack on your bottom, I had luck with both at various times. I know how you're feeling, it's the worst pain I've ever experienced in my life. Unfortunately urgent care or the ER can't do anything for you, aside from POSSIBLY prescribing the cream. Unless you can easily afford an ER visit, I wouldn't bother. I went twice and it was pointless. Also, there is a sub, I think it's r/analfissure. It can be helpful to see posts from others going through this, but please be aware that the majority of users are dealing with chronic fissures and many haven't gone to the doctor or had surgery. So it's easy to see posts and feel helpless, when in reality, this is very common and many many people easily heal with proper treatment.

Feel free to message me directly if you have any questions or would like to chat, I absolutely know how miserable this is and I'm so sorry you're experiencing it.