Sweetie pie, I don't think you are doing anything wrong, or if you are, then I did it wrong, too. And don't fret about your beautiful, perfect baby having God knows what weird problems. It's probably nothing of the sort, breastfeeding is just hard, hard work. I had no idea what it was like before the baby came, I thought you take the breast, you take the baby, you put them in proximity of each other, and then, automagically, like magnets, they just work together and you enjoy sweet surrender. I only have one child, so I've been trough it once, and it was hard-hard-hard-hard-hard. I envy all the mommies who didn't have trouble with it (if there are any).
In my (humble) opinion the bottle is not the best at the very beginning - it confuses them like crazy having milk come from the breast, then from one kind of bottle, then another. I still felt her confused with different bottle nipples even when she was 4-5 months old. What we used was a feeding syringe (they have them at amazon, it's basically a syringe with a thin tube at the top). You wrap the thin tube around a finger, and have the baby suck on that finger. When you feel that they are sucking, you give them some milk by pressing the syringe piston. And, yes, there will be dribbling, you will see the milk spilled after you know how much pain you went trough to get it pumped, but it will be less than with the bottle. It takes patience, a feeding usually lasts about half an hour once you get the hang of it (it takes a while until you learn how much of the tube should be in her mouth, and how to wrap it around the finger to get it to stay in position).
My husband was the syringe expert. Your lactation consultant should be aware of it. We got ours from the hospital when we took the baby home, it was in the well package. It was a welcome break for me when he was feeding the baby with the syringe. Like you, I thought I had "production" issues, I would have a lot of milk in the morning and noon, but towards the evening, it would be less - and that was when she was the hungriest. So we gave her formula with the syringe for the evening feeding, and then a couple hours later I would breastfeed her and she would fall asleep in my arms, happy and full. My baby had issues with jaundice, so the doctor recommended one feeding with formula anyway. She was born in 5% weight wise, and she got in the 40% at 1 month, and then 60% at 3 months, and she was in the 90% at 6. She lost the "fluff" when she started walking, so don't worry about that.
I remember I was always worried if she's getting enough to eat. My let downs were very powerful, she would gag when the milk came, and then let go of the breast (sooo frustrating). That's probably because of all the pumping I did - your body tries to adjust the production to the needs of the baby. If you pump, try to do it at the times when the baby will eat. If you set it for max suction (as I did, willing to do everything in my power to get MORE milk in those stupid bottles) it will expect your baby to be sucking with that same power. More pain isn't more gain.
I remember sending my husband to get me something to weigh her, NOW, I needed to know that she's getting enough milk trough breastfeeding, so the plan was to weigh her before and after the feeding. I never craved anything while I was pregnant, never sent him for ice cream or pickles, but for that he had to get out of the house at 8PM - BabyRUS is open until 9.
I remember that breast shields were life savers once every couple months, when she would chew my nipples raw.
I remember trying on a sports bra, because it felt good and then getting engorged breasts and plugged milk ducts, and high fever because of it...
I remember her having spit-ups until we figured that we shouldn't play with her for half an hour to an hour after she ate, and we should make her sit a little upright...
Oh, and I remember my mother in law, who could not breastfeed because she has inverted nipples, tell me how she envied people who breastfeed, because they could do it in their sleep, while she had to wake up, mix the formula, heat it, and then fed the baby. I vividly remember opening and closing my mouth a number of times until something polite came to me... It did get there, eventually, but it was a long time until then.
All my best wishes, and please make sure you get some rest, whenever and wherever you can get it...