Hyperthyroidism removed is it save for a cycle ?

Hi guys I had Hyperthyroidism which is removed now, its been 5 months. At this moment I am just hitting the gym hard 5 - 6 days a week for 1:30 hour getting good results. I have never ever felt so good after my thyroid has been removed, In fact I have gained 10kg's when I started hitting the gym again after 3 months ago, got a good muscle boost but that was just muscle memory coming back so I am still going to hit the gym hard because I love my gym can't go with out it. I am considering a cycle close to end of the year not my first just so that you know this is going to be my second one. But I want to make sure from the experts and maybe here is a guy that also had his thyroid removed and is currently using eltroxin which I am currently using because of the the removed thyroid. Is it safe to go on a cycle ? And to give you an idea on which cycle I want to go on it is a tren and test. I am scared to ask my doctor if its save because I know what he's going to say, So that's why I am asking the expert for advice on this and I want to do my homework before I do anything stupid.

My stats

85 kg's
1,76 M
Good Health and Fairly Fit according to my Doctor.
Any other stats that you need just tell me and ill give it to you.

Thank You.