Can you modify a Tarrant County Divorce Decree Online?

[lre62375]

My Ex-Husband and I have been divorced since 2003. We did the divorce ourselves online but unfortunately it seems years later we are finding out that they did not include the items we specifically addressed with regards to our child's visitation and health insurance. We made up our own visitation plan but it's not listed in the Divorce Decree! The only thing listed is Texas Standard. Is this normal?? The items we addressed were included in the "Marital Separation Agreement" but my understanding is that document was only in force during the 60 day waiting period that Texas imposes on divorces. So my question is this...is there a way to modify our Divorce Decree together online without having to pay expensive lawyer fees? We are still amicable today and though we have seldom referred back to the Divorce Decree in the past 7 years we both agree that there should be some sort of protection in the Divorce Decree document.