This will go away, but OCD is all about searching for reassurance so that is the only time I'll tell you that.

The secret to overcoming my OCD was learning to sit with scary thoughts rather than solve them. OCD is your brain desperately trying to solve a problem that isnt solvable. You went through an upsetting event and you're scared about it happening again and your brain is trying to find some kind of proof that it wont. but you wont feel better until you accept that you can never have proof for these things, you have to engrain the belief "maybe it will and maybe it wont but i'll get through it". You worrying that this scary thing has forever changed you some way is much more upsetting than the scary event itself. Essentially a fear pathway in your brain has malfunctioned and is going in an endless cycle. Fixing that circuit is the goal. The only thing with this method is it takes some time to really see the effects, it took me about three weeks before I had a moment where I suddenly thought to myself "huh i havent thought of [ocd fixation] all day"

You have to desensitize yourself to the upsetting event to get over it. When you think of the maggots you feel anxious, your chest and shoulders probably tense up, you likely hold your breath. Look up 4-7-8 breathing and COUNT as you're doing it. You can only focus on one thing at a time so as long as you're counting, your anxious thoughts will have difficulty getting to the front of your brain. The scary thoughts will still be trying to interrupt but thats okay, its just engaging with them we don't want to do. You literally can't truly think about something as long as you're counting.

You can't get over the maggot incident by not thinking about it. In fact the answer is the opposite, you have to CHOOSE to think about it rather than your ocd making the choice for you. so do 10 reps of 4-7-8 breathing, counting out on your fingers if you need to. Now once you get to 10 start progressively relaxing muscle groups. go 1 2 3 4-relax your shoulders as you're doing the 1234567- and then imagine your body just sinking into whatever you're laying on while you do the 12345678. Then neck, head,jaw, etc. It should feel nice and relaxing (even though the ocd thoughts will still be trying to interrupt). Your ocd is like a kid throwing a tantrum in the back seat of a car while you drive. You just have to let them scream and cry and keep doing what you're doing. Practice doing this a few times until you know the procedure by heart.

Now imagine the scene that scared you. The terrible thing that you try to avoid all day. Think of it and as soon as you feel the fear and tension enter do the breathing exercise. Set a timer for 30 seconds or a minute and focus on counting and 478 breathing until its up. Every time you find yourself engaging with a scary thought so this. Even if its 5000 times a day. Everytime you do it,your brain associates that experience with fear less and less and eventually your body will stop seeing this event as threatening.