Since you are the spouse of a USC and are in US, you were eligible to file your I-485 concurrently with I-130, but even if you didn't that's alright. I too made the same mistake when I filed I-130 for my husband - because I didn't know about the process. Anyhow, you can use your approved I-130 receipt and file the I-485 package, ie:
1. I-485 - Adjustment of Status
2. I-693 - Medical
3. I-864 - Affidavit of Support from your husband (and a joint sponsor, if needed)
besides these 'mandatory' forms, you may also want to file:
4. I-765 or EAD (Employment Authorization Document), since you were on H-1B earlier, I presume you are gonna want to continue to work. Unless you want to keep your H-1B status until your I-485 (GC) is approved, you should file for EAD.
5. I-131 or AP (Advance Parole). If you are filing for EAD and you intend to use it, you should also file for AP. Once you start
using your EAD, you will lose your H-1B status (even if it is still valid), and thereafter you would need an AP for traveling out of the US and back in.
PS: It would be helpful to the people replying your question, if you add a signature describing your case, status and the forms you filed.
Good Luck.