Having this weird reaction to something and can't work out what or why.

Last Tuesday morning a spot on my lip swelled a bit for an hour or so, then later a patch inside my mouth swelled for a few hours, then later the other side did the same. That night my eye started puffing up and I could tell my other eye was starting ( had a red spot on it that was tingling) so I took an antihistamine and it all stopped but the next day my eye was still a bit puffy all day.

That night, around the time the tablet would be wearing off, I had hives on my arms that were itchy, so I took another tablet. The next night the same thing. Last night I felt ok just had a few small hives on my hand that went away so I missed the tablet. This morning I have had to take another just now as I feel like patches on my hands are itchy and swollen, and my eyes are puffy.

What the hell is going on?? I can't think of anything that I have taken that is new- no makeup, detergents, toiletries etc. I ate a normal breakfast Tuesday, the only thing I think that was different was I had tinned apricots on my muesli, but I can't remember if I have had that particular brand before, surely that can't be it? I can't even remember what I ate the day before.

I was talking to a pharmacist as I have to check the tablet was compatible with breastfeeding, she said maybe something in the garden, as is had been gardening the day before, but why did it only show up the next day?

I'll have to go to the doctors next week, so annoying. I wish it would just go away!!!