Is drinking twice a week bad for someone like me?

Im a massive lightweight, we are talking 2 light beers n im feeling it in my legs. This make it difficult to drink casually, it takes me 2-3 units of alcohol to feel drunk, which is well below the recommended UK limit of 14 units.

How can I know if im drinking too much for my size? All sites show that im more than fine, but i feel like 6 units a week for someone like me (mid 20s, female, 5’3 55kg) is too much. Also to add ive never woken up properly hung over, at most i sometimes have headaches the morning after if I ate too much while drinking. Just trying to stay on the safe side, thanks