Try not to worry Whitewave, if you go on line and complete the form, a doctor will phone, talk through your symptoms and advice you to get a test. The procedure is easy and not complicated. Like you, I've been very careful but somehow picked up a chest infection a couple of weeks ago. Getting a negative test was such a relief. The doctor said as I'd been in a supermarket , briefly and wearing a mask, it seemed likely either I;d picked up the infection from a surface or someone sneezing near me. I do remember a very large man doing one of those loud spraying sneezes when standing close to me.No apology and no attempt to cover his mouth so in my mind, that's where Igot it.
Let us know how you are