I’ve had the same thing since childhood. Just feeling that something was ‘off’ even when I couldn’t put it into words. Eventually, I learned that when you have a lot of experience in a certain area, the brain has all that info to match the current experience against. This makes your intuitions MORE reliable. So, when there’s a lot of red flags in your relationship, you should ALWAYS at least investigate your instincts. Trusting your gut feeling about someone can be really accurate, because it relies on past experiences. Gut feelings ARE REAL, and they can help you navigate through life. Consider all the evidence to support your instinct before making the best decision. But trusting YOUR gut feeling is still the right decision.