Get new plant or take cuttings. Many garden centres now sell them as "herbs" in 9 cm pots. They grow quickly when you pot them on and they are cheap. Cuttings best in summer, I find. Not so good right now. Hottest, driest position possible. I would not move it....they are short lived, get very woody and you will find yourself in same position in few weeks or months time. No,fresh new plant now and you will have a beautiful silver fragrant dome in mid summer. But......don't plant outside just yet. Pot on and leave in greenhouse for few weeks. (I would take cuttings from my new plant in summer......these make much better plants than cuttings from old plants, if you can get any cutting material)