Congrats on your pregnancy, mama! That's so sweet na gusto mo pa tumulong sa ibang TTC moms even while you're pregnant na, a few of us in our mum group have actually used OPKs before and nakita namin talaga ang difference ng quality ones versus the cheap Shopee ones, so 35 pesos for certified accurate strips is a good deal honestly. Since you're offering SF lang and the expiry is 2023, siguro mag-move din agad since some TTC moms are always looking for reliable options. Good luck sa pregnancy mo, and hope mabigyan mo ng hope ang iba!