Your not whinging at all, I am glad you posted and reached out for support. First of all well done on 16 months, that is an amazing effort and something to be proud of. It is actually not all that uncommon to be feeling reasonably okay but still have urges to self-harm. I think this is because self-harm becomes a habit and coping strategy, making it hard to break the cycle but not impossible.
What's helped you get to this point where you are 16 months free? Try and remind yourself of how far you have come and of the consequences if you do self-harm. Also have you tried distractions, there is a great list of distractions
here. Also what about journaling to help get out some of those feelings you are feeling when the urge to self-harm arises.
Also identifying why you want to self-harm can help also. Some people self harm to get a release or gain some control or to produce feelings or even as a punishment. Once you identify the reason why you can work on another way of getting what you need. For example if you are wanting to produce a feeling other than numb you could try having a cold shower, or even using some body lotion and noticing how it feels on your skin. Hope some of this helps. Take care
Kat xxx