T3 is a precontest drug for big boys that aren't blessed with high metabolic rates. As with steroids, if you mess with it, you take the chance of shutting your thyroid down. I've seen it happen to 2 females that jumped right on what their idiot boyfriends said for a tiny local show. I got my ex wife from her first figure contest to her pro card in one season without it. If you use it you will likely rebound when you stop. Lastly not to be a dick, but at 180 thyroid hormones should be the farthest thing from your mind. I've never had to use it and I carry 80lbs more muscle than you. At this stage it will impede any progress you hope to make or maintain.