That is all totally normal!!!! Of course you worry, you are a mom. First of all, not every baby is the same, even your own. My two boys were like night and day different! Worst case scenerio let's say you do have another fussy baby. You've done it before, you know you can handle it and you know you can get through it. You don't know your own strength and perserverance!!! If you are nursing try more holisic remedies to the post partum, again you know the signs and symptoms, if you aren't nursing there is ABSOLUTELY no shame in asking your doctor for a little medical help through that period in your life. There are some very good (weight nuetral) medications that can help give you the boost you need. Of course you worry about your finances, but you'll manage we always do. You are not betraying your first child, if anything you are adding an blessing to her life. You are giving her a playmate and sibling to love and bond with! I remember when I got preg w/no. 2 crying to my sister that I didn't think I could ever love anyone else the way I loved my first son. It seems so silly now, I love both my children. I cherish their different and unique personalities.
You are not alone.........I am pregnant w/number 3 after a 10 yr break w/husband number 2. My biggest fears (regardless of how unrealistic they are) .....I had two large (my smallest 9 pounds), healthy babies. They were happy, content babies. Didn't fuss, latched on to nursing great, just couldn't have asked for better infants. I fear that I will have a very small, delicate, fragile baby. I fear I may have a colicy or fussy baby. What if they won't latch on to nurse and refuse (financially I really don't want to do formula). We have no baby items anymore (but are having a large family shower). I did not have post partum, but what if I do this time. What if my older children resent me for bringing this loud, colicy, time consuming, delicate package into our home. My boys play lots of sports, are active in the community, belong to scouts, etc. How will a c-section and infant take away from the time I spend w/their activities.
I know in my heart regardless of the size, shape, disposition, eating habits - I will love and care for this baby. I know my husband (this is first and last child) will do the same. I know we will hit rough patches, but I love my husband and have confidence that we can get through this. I know my children will, eventually, come to bond w/their new sibling and form their own relationships together. I know financially it will work out, you juggle, you manage, you cut corners here for now and there later, you make it happen! I know this baby will spend its fair share of time at their siblings sports, scout and other events, just like we have always done (strapped to my stomach in a nipnap, straped to my back in the carrier, or in the stroller - life goes on). My children have learned to adjust to the noise (we are a fun, loud family), the busy life style we lead and I hope in the end have fun and some great memories of how we tried to support them at their events as a family and did lots of family things together. Plus we have trusted friends and families (and my oldest will have his own car soon - there's some cause for concern!!!) and we have offers and help for activities. See I just talked myself off the ledge!!!
Trust and have faith in your own strength, the strength of your husband, your marriage and your support system!!! Don't be too proud to ask for help, know your own limits and enjoy this addition to your family!!!