Please try not to worry, though I know that is way easier said than done.

I had thyroid cancer three years ago and while obviously, nobody wants any form of cancer, it really isn't what you imagine when you hear the word "cancer." Except for a very select number of people (my mother and siblings, the principal and SENCO in the school I teach in and one other teacher who is best friends with the SENCO and who I didn't want the SENCO to feel she had to keep secrets from and an uncle who drove me home from hospital), I just told most people that I had to have my thyroid removed as that really gave a better description of my experience than what most people would imagine if they heard the word "cancer."

If it's any consolation, I got my diagnosis in November 2019, had my thyroid removed on the 6th of January 2020 and was back at work a month later (honestly, could have gone back to work sooner if I hadn't been working in a role where I really need to be able to speak for long periods and turn my head easily). I was pretty much fine a week or so after the operation.

I did have radio-iodine treatment the following May, which essentially meant swallowing a capsule to ensure the remainder of my thyroid was removed and had to wait about a year for a second all-body scan to be 100% sure I was entirely cancer-free, though the consultant told me "we got it all" as soon as I woke up from the operation. 

As your son is only a year old, the odds are he will know nothing at all about it, that you will be cancer free by the time he is two (that is assuming you have cancer, which is not at all certain; lots of people have thyroid nodules and the vast majority are completely benign).

At your age, the most common forms of thyroid cancer have a near 100% survival rate. They often talk about reccurrance-free survival rather than just survival rates. In fact, I read one or two studies that ended with "we also intended to study the effects of *whatever we were studying* on survival rate, but since we only found (maybe 7 people who died out of say 400 being studied) we couldn't complete that part of the study." And it rarely requires ongoing treatment.

It's been said that if you had to have cancer but could choose the type, thyroid cancer would be the one to choose. Admittedly, that wouldn't be a good range of options.

I hope you get the all-clear, but even in the worst case scenario, it's...well, the actual words of the consultant when he diagnosed me was "ah, it's not the worst situation in the world."