I really sorry to hear that. It totally sucks. I had a boss whose favorite expression was "perfection is the enemy of the good," and it applies perfectly here. Pun intended!
You really need to get a handle on this, because I have a feeling, without even knowing you, that what you had been working on for months was probably fine before you started tinkering. In any case, consider the irony that your desire to not be rejected causes you to keep rewriting until such time as your odds of being rejected increase substantially due to the timing of your submissions.
If things don't work out this time (and keep
@LizzyM's comment in mind for the next two months), just don't do this in the future! I don't usually recommend paid consultants, since you can get comparable or better advice for free right here. But in this case, given the amount of money you are spending on application fees, it might be a reasonable investment, just for the peace of mind of having someone with experience either help you get over the hump with your writing, OR, more likely, validate that what you have been doing all along is fine. Anything that gets those applications submitted in July-August would be well worth it for you at this point. GOOD LUCK!!!!!!!!!