A link with chernobyl?

When the chernobyl reactor went into meltdown in 1986, I was 7 years old, and I know for fact that some of the radiation found it's way to Scotland where I live and did at the time, I also remember at the time that you were advised not to eat any meat or drink milk for a period because of the risk that some of the radiation got onto livestock grazing in the fields. Radiation can go for the thyroid gland and it can have an effect on young children, which I was at the time, it is also the time I started to put an uncontrollable amount of weight on, I was slim up until 1986 then I started to put weight on and it has never came back off again no matter what I try, so I was wondering if maybe I had been contaminated in this way?