Thank you for clarifying that you're not trying to do both at the same time, because that's not gonna happen.
This is an issue of diet. It's all diet, which I'm surprised you haven't posted yet, because that's most likely what needs to be changed.
Personally I think you should stop whining and put the work in. Your goals demand a lot and you're saying that it's "hard to perform", "don't want to overtrain", "mentally exhausting", "I'll get sick of it". Either make your goals easier to achieve or put in the effort that's needed to achieve them. Focus on hitting great personal PRs and the lose fat, or drop the fat off and then do the comp.
That being said, considering your situation, I would suggest you do the former because honestly, even if you do lose 5-10 lb in 4 weeks, you'll most likely put it back on during the meet prep.
You can either:
A) (My suggestion) Up until your meet, focus on getting as strong as possible while maintaining your BF levels. Make sure you put in the food and the work that you need to achieve solid PRs. You will have to be EXTREMLY PRECISE with your diet here if you're so adamant on fat loss. More muscle means more efficient fat burning down the line and in 17 weeks you can easily gain more muscle and strength. Not to mention that you will probably burn fat in the process. Focus on the fat loss after the meet. This is much simpler and better in the long run.
B) Find yourself a good 10 or 12 week meet prep template. Schedule it and then for the next few weeks leading up to the start of the meet prep, stop focusing on lifting and put in 3-4 days a week of just hard cardio and conditioning, stuff that won't make you lose muscle: sprinting, jumping, jumping over stuff, throwing stuff, carrying stuff and pushing and pulling. Drop your carbs to only the peri-workout (only before and after) and up your protein and fat. If you have 4 weeks before the start of the meet prep you should be able to drop up to 10 lb including water, however like I said, you can very well put all that weight back on from the meet prep. This option requires A LOT more work: balls to the wall conditioning and then an extremely strict diet to maintain your conditioning WHILE at the same time building strength.
I think it's better to focus on one thing at a time. Do the meet, perform your best and then, with your new strength and musculature, focus on the fat loss. You can always lose the fat especially if you prioritize getting stronger.