Constipation Issues

Ever since I stopped breastfeeding Lily she has been pooping less often...I had expected this. She had been going #2 at least 4 to 5 times a day and when I switched her over to forumula this decreased to 1-2 times a day and soon to every other day and now she is not going for 5 days. It doesn't seem to bother her, but it bothers me. I had given her a glycerin suppository and she went with ease...a little pastier than her breastfed stools...but once again to be expected. She would go another 4-5 days without going so I'd give her another suppository and she'd go with ease...no straining and the stools are soft. I wasn't sure if she was getting constipated or if this was just going to be her pooping schedule. The other night I have her 1/2 ounce of apple juice diluted with 1/2 ounce of water. She drank it right down, but then an hour later she was SCREAMING! I knew she had a tummy ache. Her face got bright red as if she was trying to have a bowel movement, but nothing was coming out. Once again, I gave her a suppository and she blew out. I called her Pediatrician the next day because I know I shouldn't be giving her suppositories every 5 days. I thought maybe we would have to change her formula. Being a nurse myself I specifically asked to talk to her Dr. and not the nurse. Well...the nurse called me back even though I requested the Dr. to. Anyway, she said it is okay and even normal for babies to not poop for up to a week. She didn't think Lily was constipated because her stools are soft and not dry little pebbles and also because Lily is not straining to go and that it doesn't seem to bother her. The nurse told me that Dr. Russell would call me back today to discuss this further. Well, it is 3:45pm and I have not gotten a phone call...very irritating. Anyway...good news to a long story...Lily pooped on her own today!!!