Bullseye just disappeared

Hi there

I was camping in a wooded area last week known as "medium" risk for infected ticks.

Something bit me - I assumed a mosquito. It was very itchy.

Last night I noticed a ring around the bite, like a bullseye rash albeit faint. It was maybe 4cm across. I took photos. Was booked in to see the nurse this morn.

So this morning, the bullseye ring was just gone. It looked like a normal bite. I showed the nurse the photos first - she said definitely a case for antibiotics. Then I showed her the bite and she was baffled.

She asked the GP, who said to prescribe antibiotics. So I've got them, doxy for 21 days. I will take them but I've a nagging feeling it was probably a mosquito bite I reacted to (I have form for this). My question is: has a rash disappeared like that and still been Lyme?

I am not too worried. The doctor is fab, I trust him. But I'm at a music festival this weekend and I wondered if I would be silly to drink a pint of cider, maybe two. I wouldn't get excessively drunk as I have a 5 year old but a pint might be nice.

Would that be really silly? What would you do? I did ask the nurse and she said it would probably be okay but then I read that it might lessen the efficacy of the pills. So I would like to know if anyone has ever had a bullseye rash for any other reason, especially such a quickly disappearing one !