Wa'alaikumassalam! Ahhh sayang, at 4 weeks postpartum your body is still adjusting lah, hormones masih semua berterabur and immune system pun weak sikit time ni. A few of my mum friends also kena selsema and itchy eyes dalam first few weeks, so you're not alone! That said, kalau mata gatal tu really tak boleh tahan or it's lasting more than a few days, better check with your doctor just to be safe, sometimes postpartum allergies tu legit and doctor boleh bantu. Make sure you're resting enough and staying hydrated ye, sebab body needs all the strength right now especially if you're breastfeeding!