Help!

Hey all so ive been ebf for 16 weeks now. I pump once a day in the morning to try and get a but of a stash for when i fancy a drink etc. Over the weekend i went to a party and fed her bottles (5oz) of expressed milk at 7pm, 11pm then the next morning at 10pm. I pumped at dumped each time but probably only 3/4oz in total a time, taken from both breasts. Ever since sunday my boobs seem really empty though?! She only usually feeds of one breast at each and she is pulling and tugging at me and demanding both as though they are empty. Is my supply drying up?!