Thanks all, I spoke to the oncology ward, they said if the pain is on the side where the tumour is and was localised and not radiating it could be pain from shrinking, not sure how likely that is after 1 session but will speak to my onc next week when I catch up with her, was advd to take Panadol and if no better by that evening to go to the ED. Took Panadol and pain seems to have subsided - maybe it is anxiety.
@arpie, they did give me anti nausea tablets, I am finding I am getting by with only 1 in the morning as nausea is ok, it’s just the bone weary exhaustion that is getting to me.