Glad to report that I have made it to day 4! Yesterday and last night was particularly hard, I found it emotionally very difficult. Really could have caved late last night at about 1am but luckily I hung on in there and didn't.
This morning I feel much better than I did yesterday. Hopefully I'm over the worst. I already feel "cleaner" inside i.e. breathing is easier and my sense of smell is improving.
Don't want to get complacent yet though, I know I'm not out of the woods yet.
Thanks for everyone's support on this forum over the last few days, every message I've received has been really helpful to me!