Skipped feeds supplyhelp

Lisa
Im concerned. Little one (5.5 months) has been ebf until very recently. She is on 2 meals of puree food a day and she has always been tiny (bottom percentile) and she never seemed interested in being at boob longer so doc suggested solids and she loves it. 
I decided to give up pumping and give formula on the very rare occaison im not with her (maybe just 1 feed max a week) Well with it being nye i decided to give her bottles so i could drink. She had bottle at 9pm, 11pm, 9am and 11am (around 5/6oz each time)
Im worried my supply has gone diwn rapidly - i only pumped once that entire time of missed feeds, only got 4oz and didnt feel engored AT ALL.?with 4 missed feeds i would have expected breasts to feel sore and full? What if my supply has been low for weeks and ive not been giving l.o the nourishment she needs?! Feeling awful. Should i start supplementing each day or trust my body?