Ohhh normal je sayang, especially at 20 weeks, hormones kamu tengah kerja berat dan breast tissue sedang prepare untuk breastfeeding nanti, so rasa cucuk-cucuk atau sedikit tender tu common! A few of my mum friends juga cerita sama, terus hilang after a few days or weeks. But kalau rasa pain yang intense or ada yang lain (macam discharge pelik ke, or very swollen), better check with your doctor cepat-cepat just to be safe, pregnancy first time memang takut, so no harm asking! Congrats on your pregnancy, mama!