If you are noticing bad habits, QUIT SHOOTING IMMEDIATELY.
Once the bad habits set in, they are hard to get rid of. Take a day or two off and go give it another try. First draw your bow (without an Arrow on your string) to full draw, hit your anchor and hold steady. Let down gently. Repeat till it becomes a repeatable habit. Then once the basics are covered, put an arrow on your string and do the same EXACT thing. DO NOT shoot the arrow, just have it pointing at a target for safety. When you can consistently reach your anchor and hold while pointing at the target, then work on your release. If you are new to this, just know, it DOES NOT happen over night, and none of us are immune to having issues every now and then. Never give up!!!
Lastly, try to end a practice session with a perfect draw, anchor, release and hit. If it happens to be your 1st shot of the day, or your 100th, it will do wonders for your confidence to stop shooting right then and there and walk away with a smile. Believe me, it works.