Luckily, the rheumatology nurses did make a point of telling me not to rush the injection and that stuck in my head, so as I got up late, I didn't bother doing it until I got back.
Got to go back in 2 weeks unless my GP says otherwise as my CRP levels are still high. One thing the rheumatology nurse told me when she was teaching me to inject is my CRP level when I was first referred was one of the highest in the entire clinic! But just to show how much of a difference the methotrexate has made, my levels have dropped from 124 when I was referred last year, to 16.