Photographer and Model issues

I have had many issues with the organisation of both models and photographers, I have been frantically exchanging emails between photographers and models trying to agree dates that everyone could do. I have found  this to be one of the most challenging parts of the project organising a team, the anticipation of waiting for a reply and the back and forward exchange of messages trying to organise a final date is quite time consuming.
I had planned a shoot with one photographer that was meant to be helping out on a a few of my shoots and a few days after exchanging mood boards and 3 days before the shoot she decided to pull out of helping me as she was to busy with her own work. This resulted in me panicking as she was one of the main photographers that was supposed to be helping me, this caused me to have to re think and message others that had offered to help and see if I could find someone who was available as I did not want to delay any more of shoots if possible of fear of falling really far behind. I luckily had lots of interest in my project before from photographers so did have lots of options, It was just worrying because I knew a lot of the photographers would be busy now with either there own projects or helping others out.
As well as having issues with photographers I have had a few models that have pulled out last minute causing me to have to re schedule the shoots for a later date. One model I had to reschedule the shoot 3 times I was considering giving up on re scheduling with her but it worked out in the end and the images came out great.

I hope to not have many more disruptions with shoots and re scheduling. I believe I have now found two photographers that are willing to help me for the remainder of my project who I have also helped in return this has allowed me to feel confident in the further production of the project. I feel confident in the planning of models I have coming up also so I hope nothing else goes wrong.