Itchy Neck/Scalp on Tamoxifen?

I’m on my 2nd week of tamoxifen pct and I’ve been getting these itches that won’t go away until İ shampoo it about 4 times a day recently. I’ve read some side effects of tamoxifen and they include itchyness apparently so I wanted to ask if anyone else has experienced this because it’s either the drug or my cat allergy evolving further OR changing my shampoo brand after 6 months of consistent use