If you still have symptoms I would consider increasing irrespective of blood tests.
Regarding your levels, whilst there are limitations to the accuracy of these, particularly if gel is used, I personally wouldn't be happy with less than around 400pmol/L, however people's treatment goals are all different - mine is healthy longevity, others are happy with palliation of vasomotor symptoms.
The minimum level cited in NHS literature as providing bone protection for most women is 250pmol/L.