Try not to worry too much as you will now be on thyroid hormones and you had no way of knowing you were hypothyroid. Sometimes women become hypothyroid for the first time when pregnant or after delivery.
You are just over the top of the range and some people have a TSH in the 50's.
I trust you have good doctors and members who've been in a similar situation to yourself will respond.
When getting blood tests they should be at the earliest possible, fasting (you can drink water) and allow a gap of 24 hours between the last dose and the test and take afterwards.
Always get a print-out of your results with the ranges and post if you have a query.
Levothyroxine should be taken with one full glass of water and wait about an hour befor eating. Food can interfere with the uptake.