oh god you sound so upset and stressed needsmorewine firstly i am not an expert but a weight gain of 9oz in a week if great and if she has then gained 7oz over the next fortnight then that is still ok, she isnt going to gain huge amounts every week.
is she very sleepy? and it is hard to wake a very sleepy baby, sometimes they just arent interested in feeding when sleepy. i would be inclined to see how long she would sleep for, i wouldnt let her go longer than 5hrs or so, but every 2 hours seems insane for you and for her.
you say she is awake more and happy and alert, so she is obviously doing ok, it doesnt sound to me like there is major cause for concern or formula top ups? i could be wrong, am sure tiktok will tell me if i am.
i think you need to relax and spend some time cuddlng and relaxing with your baby, let her feed on cue, maybe spend some time in bed and let her nuzzle and snuggle and latch etc as she wants to, stop obsessing about the clock, she doesnt know how to tell the time! her tummy will let her know when she is hungry, or when she just wants to nurse for comfort etc.
also her feeding a bit, then falling asleep, then feeding more when you milk lets down again is normal, mine would all do this and i let them when i could but if i was busy had other to deal with i would take them off and try and put them down, or in the sling, they would let me know if they wanted to go back on again.
i am not sure what else to say but i really think you need to see a bfeeding counsellor to help reassure you and to check your babies feeding if that woudl help you.
GET RID OF THE SCALES!! and try and follow your instinct and your baby a bit more. if anything i think you are over thinking this all, but i know how worrying and stressful it can be when you feel babies arent feeding properly, but it sounds like she is doing ok. xxx