L.D.
You have to think about what you are comfortable with. If your children are not well disciplined and you already have anxiety, I would be hesitant to have another in my opinion. I am expecting my 4th (all four are boys) and my children are well behaved for the most part. The issues that are there, are being dealt with as we figure out what works best for those situations but I could not imagine life if it was chaotic because of behavior. There are enough other things to make life chaotic...another child in school, in sports, ill, etc. Trust me, the ill factor and time are both reason I am ready to stop. Every time one gets sick, the rest are not far behind. I REALLY wanted a daughter. I love my sons with my whole heart but since I was a little girl, I've always imagined having both sons AND daughters. I've even pictured what my daughter with my husband would look like, have my Barbies and wedding dress stored, etc. The realization of that not happening now is something that greatly upset me. But I have to do what is best for my family and I know I can't give more than 4 children the same quality of time that I will be able to give the 4, which is already something I work very hard at keeping balanced and it isn't always easy...especially when there ARE behavior issues or illnesses. So, my opinion is you need to think about yourself and what YOU are comfortable with. I do agree with you, being a mom is a blessing and there are going to be so many more wonderful experiences for you to go through as a mom. It doesn't stop just because pregnancy isn't one of the phases anymore. Trust me, I get it. My husband and I are a bit sad knowing this is the last pregnancy...the last "baby phase" but we know we have so much more to look forward to with the children getting older. You will too.
Good luck.