Yes. You should increase the dose to 25 mcg per day. Review your symptoms at the end of 1 month. If there is good response, estimate TSH level
to see if it is within normal limits. If the response is not good, increase the dose by further 25 mcg to make it 50 mcg per day. Estimate TSH level after a month and see your doctor for further management. I would not recommend you to increase the dose further beyond 50 mcg on your own without consulting your doctor. All your symptoms, including the problem of weight will abate once the hormonal
levels reach normality; but to achieve that one has to go slow. So have a little patience, everything will get alright.