Nipple sensitivity and itching sensations are absolutely normal while both on-cycle and in the course of PCT.
Don't play with or palpitate your nipples, your hormones are in flux and this is a natural consequence of PH/DS use.
If you experience painful swelling, tangible lumps beneath the nipple itself, or burning sensations then gyno may be an issue.
From what you have described, I think you're fine. Take a deep breath and finish the cycle.