Unknown anaphylaxis

Hi. Difficult to describe without photo upload option but here goes.... I'm not a gardener. However I was in a garden and shortly after I had a horrendous allergic reaction to something. I not knowingly allergic to anything other than penicillin. The Doctor said is was definitely something I've ingested rather than a bite from an insect due to the symptoms. The only thing I can think is I handled a plant bare-handed and wanted some expert to help identify the plant so I know if it could be the cause... TL;DR The plant is a climber, was on a feature wall. Mid-to-dark green foliage, almond-like shape to the leaves, they are roughly size of an adult small finger. The leaves run parrellel each side as opposed to alternate leaves each side. It has a small white flower with 5 petals. It flowers at the end with a small cluster of them at the end of the leaf shoot. Any help would be greatly appreciated. It may or may not be this plant but I need to narrow the cause down as it was very alarming. Thanks Ben