S.:
Hello! First off - thank you to you and your husband for your service and sacrifices to our country. I know being apart is hard on a marriage and a family.
Switching to formula is not going to solve the problem. If you are successfully breastfeeding, which it sounds like you are, there is no need to switch.
DO NOT worry about her being overweight YET - that's when she's 4 and 5, not a baby! :) A child grows more in their first year than they will for the rest of their life. She NEEDS this chunk to help her grow.
Babies LOVE routines - our routine is bath, brush (hair & teeth), book and bed. We've been doing this since they were born and it works. Get her into a routine and things will be fine.
She might also be picking up on your cues too - your husband is coming home soon! You are excited and nervous! You might be surprised what your husband will want! He will be thankful to be home safe and sound and love being with his girls!
Is she on solid foods yet? Like oatmeal or rice? Try feeding her before bedtime and then nursing her - that might help her feel full longer.
I hope this helps!
Best regards,
Cheryl