Really, my S/N and F/T are not very clear, but if I had to choose, I am INFJ . . . . I guess we are all a work in progress . . .
Remember those HOME ALONE movies. If the parents were good at 'S' they wouldn't have to count the children, they would 'just know' that one of them was left behind.
Verona, because you are a J, S is expected to be the 'developable' 3rd strength. And it looks as though you have had plenty of opportunity to develop that that 'S.' I would guess that you do get the 'falling in a covered hole' experience when it comes to the strengths of a T from time to time.
Thinking and feeling are the decision-making ...functions. The thinking and feeling functions are both used to make rational decisions, based on the data received from their information-gathering functions (sensing or intuition). Those who prefer thinking tend to decide things from a more detached standpoint, measuring the decision by what seems reasonable, logical, causal, consistent and matching a given set of rules. Those who prefer feeling tend to come to decisions by associating or empathizing with the situation, looking at it 'from the inside' and weighing the situation to achieve, on balance, the greatest harmony, consensus and fit, considering the needs of the people involved.
As noted already, people who prefer thinking do not necessarily, in the everyday sense, "think better" than their feeling counterparts; the opposite preference is considered an equally rational way of coming to decisions (and, in any case, the MBTI assessment is a measure of preference, not ability). Similarly, those who prefer feeling do not necessarily have "better" emotional reactions than their thinking counterparts.
Do you get blindsided at times when interacting with people who make decisions based on 'how well a proposed solution follow the preset rules,' or who reason from a 'detacted viewpoint?' If so that's because your F is you Strongest strenght - even though it's private because of your I, and what people react to is your strong N.
HTH,
Grinity