I volunteer weekly at a youth club. Since the beginning of this year it has been decided that we will hold monthly events for people outside of the youth club to come along to, in addition to our normal programme the other 3 weeks of the month. I wasn't involved in this decision, I was informed of it later. This additional event requires preparation such as setting up beforehand, having a team of volunteers to welcome people as they arrive, volunteers to serve tea and coffee to guests afterwards.
My mental health isn't the best at the moment. I have been on medication for 3.5 years and I go to counselling. I started a new job a couple of weeks ago and I have other stress going on in my life too, so I feel a bit overwhelmed/at capacity.
I therefore emailed the youth club coordinator (who is also a volunteer) about six weeks ago to let them know that I can't do anything additional to help out with volunteering beyond what I'm already doing. This was prompted by them asking me if I could take responsibility for the welcome team for the monthly events. Even though it wasn't a huge responsibility, I recognised I didn't have the capacity to do it at the moment. They didn't reply to my email - I think they are just very laid back and probably didn't feel it necessitated a response. Leading the welcome team wasn't mentioned to me again, so presumably they received my email.
This weekend after the normal weekly youth club session, the coordinator asked me (in front of other volunteers) if I could help with tea and coffee at the next monthly event. I felt pressure because of the other people listening and also I feel like the coordinator doesn't fully understand where I'm coming from with the mental health/capacity side of things, so I agreed. But I really don't want to do this and I feel like my boundaries have been ignored - in my email I said I couldn't do anything extra beyond the usual weekly youth club.
So I need to go back to the coordinator and tell them I can't do this - help! I generally have a good relationship with them but I don't feel they hear me and I'm beginning to feel a little bit resentful. I find it difficult to say no