Congratulations!!!!!!
Giving him formula does cause low milk supply, unfortunately (been there

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I would forget the formula completely. If he needs to nurse every hour, then let him nurse every hour. That is the fastest way to build up your milk supply, and far better for him than chemicals out of a can. Formula is also a big factor in juvenile diabetes, BTW--it contains corn syrup.
Doctors are the worst sources of info for breastfeeding. They tell you that formula is the equivalent to breastmilk--and it's not. There are over 100 substances in breastmilk that they haven't been able to duplicate yet. They tell you that feeding every 2-3 hours is normal--and it's not. The first few weeks, feeding every 30-90 minutes is normal. No, you can't really get anything else done, and you shouldn't expect to. And they never tell you about growth spurts, where the baby wants to nurse constantly.
In fact, I had a pediatrician tell me that if the baby wanted to nurse more than every 3 hours, that meant that my milk supply was low and that I should supplement with formula. Nothing could have been further from the truth. They nurse constantly to get you to make more milk--and it does work. Usually the growth spurts occur at around 3 weeks, 6 weeks, 9 weeks, 3 months, 6 months, and 9 months, but might occur more often then that.
The nursing benefits for you come a bit later, when you can pick up your baby and go anywhere you want with nothing more than a diaper bag. I don't even recommend pumping and bottle feeding it to him unless you work outside the home (then, it's a must!). Nothing is more INconvenient than bottle-feeding a hungry baby if you nurse! (been there

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For now, sleep when he sleeps, nurse whenever he wants, tell your husband you can't (make dinner) (vacuum the rug) (clean the bathroom) (fill in the blank) right now because you have to feed the baby. Then, put your feet up, nurse away, and relax!
The only thing that causes low milk supply in a healthy mom is not nursing enough--which feeding formula ensures. Pumping doesn't empty the breast nearly as well as a baby, and tires the mom out if she is nursing and bottle feeding too! Who needs all that??? (besides for working moms, of course)
I do think we are lucky to have formula for moms who for whatever reason can't nurse, or who have a low milk supply for medical reasons (low thyroid can contribute to that one, as can having been on magnesium sulfate for pre-eclampsia) or other reasons.
He might fuss at the breast a bit for now because you are giving him both breast and bottle. That is very hard for some babies. If you have to go back to work while he is still nursing, then I'd say you need to just give him one bottle a day--and get your husband to give it to him. Less confusing for the baby if he just associates you with the breast.
Look up www.llli.com, and you might also be able to get some help from your hospital's lactation consultant. If it's over the phone, it's free, but I think you might have to pay something if she comes to the house.
And I've read studies that indicate that nursing moms get better rest and produce more milk when they sleep with the baby. I believe it--but it isn't necessarily for every mom. Some moms and some babies just do better by themselves. Do what makes YOU feel right and happy.
If Mama ain't happy, ain't NOBODY happy!!!!!