Sick now with respiratory illness, not sure whether conceived

I have been suffering from respiratory illness for 3 weeks.

It hasnt been getting better so the GP advised me to get a chest x-ray. The radiology lab said they won't do an x-ray unless I m absolutely sure I m not pregnant. There is not a high chance that I m but I cant rule it out either.

So I m thinking should i delay x-ray n turns out I m not pregnant but hving a serious lung infection I would be in trouble.

On the other hand, I could do an x-ray elsewhere n later find out I had conceived. That's trouble too.

I m between periods now and need to wait around 2 weeks for my next period.

I had been prescribed antibiotics and codeine. I will check with the chemist tomorrow.