Getting prego HELP!

I am on levothyroxine and been on it for about 2mon going on 3 in December. So I love my fb and I've been wanting to have a baby cuz it hard with thyroid a but my levels should me even now. So I told him I want to have a baby but he thinks I'm playing cuz I don't have kids and always say I'm not ready but now I am and he thinks I am playing with him. I've been feeling kinda dizzy, sleepy, sick and cramps lately we have been doing it a lot kinda and I have these bad headaches. Don't really have a question I guess lol just want some advice