I want to give up breastfeeding.

Yes I want to give up breastfeeding for selfish reasons. My daughter is almost 7 weeks old. In that time I have gained 10 pounds. breastfeeding makes me hungry. I'm very active. I don't just sit on the couch. I have a fit bit and I make sure I excercise and walk atleast 4 days a week. Im starting to get depressed and frustrated. My body feels miserable. I don't want to go out in public because I'm embarrassed how I look. Yes I'm going to try to workout more and eat healthier but that's not what is making this so hard on me. I'm just exhausted. I'm the only one getting up with my daughter to feed her and I have a three year old at home. I don't want my husband touching me and I hide from the mirrors at home. I understand I just had a baby but the weight gain is excessive! I'm miserable. I cry. To top it off we have had attachment issues from day one. We have to use a nipple guard to breastfeed. I feel like this is selfish but i also feel like maybe formula would be best for me and our family.