Start drawing and letting down occasionally to relieve the pressure of feeling like youe HAVE to shoot every time you draw your bow. That way you don't feel like every time you draw it means you have to shoot.
It has helped me and reminds me to engage my back muscles. To hold at full draw is hard if you don't use your back muscles. I find often if my accuracy has gone to crap this process helps. Do some of this practice with blank bales too! Finally you might want to take a day off shooting to kinda let the stress go. Yopu may have slight target panic and not even know it.
In my opinion,
If you can't hold at full draw without letting down and not shooting, then you are definitely having some target panic. You should be able to pick your spot, come to full draw, hold and let down-if you want. If mentally you can't do that and HAVE to let the arrow go. You need to work on target panic. This was an issue for me and p&ssed me off because I consider myself mentally strong. It has cured a number of problems for me as much as I hate to admit it.
I hope things get better!