You need to research nolvadex, toremifen, and clomid for post cycle therapy (pct). This way you will understand what they do and how they get your test working again. It's great that you have a baseline number but we can't give you a specific time frame. Deca will shut you down pretty hard. Yes it could be three to six months but you could feel better next week it just depends on your body. I would continue to eat big and lift hard and you should be feeling better soon. The worst thing you can do is sit and worry and become obsessive with it. Get out and continue to workout and keep on your doctor. I think you will recover just fine eventually but there is always a risk that you won't. But a better chance you will.
If I were you, I would order a post cycle therapy (pct) from pp the place that RJ recommended. If your parents find it, tell them you used a prohormone, which is legal, and explain that this is what you use when your done. Or tell them it's a supplement. They won't know what nova or clomid is. It doesn't say for steroid use.
If I was in your shoes I wouldn't care if my parents knew as long as I could get myself back to normal. Your parents will forgive you so don't risk fucking your self up