First of all, the only thing that most likely would be in the way of you pleasing a woman would be that shitty mindset. You are not small, you have a average sized penis and you have the potential to please most women (not all, just like with everyone no matter the size).
So the absolutely biggest issue here is not your penis size/girth, it is your mindset. You are convincing yourself you are not good enough to please a woman and as the mind is a VERY powerful tool that is what would be your enemy, not your size. Confidence is very important and women find that very attractive, so work on that confidence before worrying about your girth.
3 months is a very short time frame when it comes to PE I have come to realize, especially if you are not very consistent either. Those 3 first months are basically about just conditioning your penis for further progress and any gains you get is just a big +.
According to you: ”I felt great and had amazing erections but I can’t do them constantly because I have tight schedule”. For PE to work, you have to be consistent and very patient. I have done PE for 7-8 months now with minimal results and I have been consistent but I am not planning on stopping this journey for a very long time. If you truly want a bigger sized penis, then you have to take it seriously and expect to work on it for years, not months.
I am also average sized, shorter length than yourself but slightly bigger girth. I am 100% sure my size can please most women, but I’ve always wanted a bigger penis than what I have got, so you could say I am doing this for 100% selfish reasons.
Wish you the best buddy, don’t give up.