M.M.
well congrats on your baby. Yes it is possible to have a 4th c-section. The 4th one does put you at a little more risk as it is the one that places you into a different risk category, but you should be fine. There are a couple of things to consider. 1st talk with your OB first. Find out how thin your uterine wall is and how the scar tissue is from the previous ones. 2nd If you have had any previous uterine surgeries, this places another risk for you... I your primary (1st) c-section was due to having a big baby and not progressing with labor, then it should be fine if the uterine wall is not thin or too much scar tissue. 3rd Please wait.... You are wise to wait. Let your uterus heal longer than 6 months and gain the basic tone back. This will degrease your risk for complications too. Close spaced pregnancies is a strain on a uterus; especially while breastfeeding. 4th Regardless of what others are saying here.... After 3 c-sections there is NO WAY you should consider a VBAC; especially never having had a vaginal delivery... I do not think you will even find an OB that would agree to that....
So I hope this has helped. Congratulations on your recent baby and giving him the gift of Mother's Milk...