Sound like Botox is working for you, and I would say yea give you body plenty of time to heal.
I have tried VERY strictly diet before and setbacks still happen. As for now, I usually have cereal/oats/baked sweet potato for breakfast. I kinda just eat whatever I like for lunch and dinner - I usually eat a healthy diet so some veggies/carbs/proteins. Benefiber with lunch and dinner, then half sachet of Movicol before bed time. I have played around with Movicol dose and even when I take a full sachet, it does not solve the hard tip problem for me so I've kinda given and just take half dose. Last week has been awful so I have started taking Mg Citrate again, the one from Swisse x2 tablet. My CRS asked me to take Coloxyl but she said Movicol should work just fine. She's also suggested Metamucil, but I'm worried it'll bulk up too much. I drink at least 2.5-3L water every day.
I honestly don't know what else I can do, and why it's still not healing...actually worse, now I have 3 fissures which is not common.