Well I haven't seen where vaccinated people can get it still. I think you should see a doctor and let him tell you what it is. It is better to be safe than sorry. You maybe thinking rubella but it maybe something else. Hang in there both of you. I wish you both a speedy recovery.
Actually I was thinking dengue but really didn't wanted to alarm you (myself too I guess). I am glad your son has recovered, I know all too well the pain a parent feel when their child is sick. My prayers are with you both and I am sure you will recover soon.
P.S. Please forgive me but I really was praying more for your son's recovery, not that I didn't wanted you to get better but as I said, I know the pain parents go through when the kids are sick. Now that your son is better, you can focus on your own recovery now. Again I am sorry for being so ? ( I don't know the word to describe it now) but you understand right?