hypothyroidism and clomid

My husband and I been trying for about a year . We'll I knew it wouldn't be easy because I had cancer young and they told me it wouldn't be easy to have a child . We'll at 20 I had my baby girl that is now 3 and it was by my ex . My husband has been in my child's life since she was 2 weeks in my stomach he was my best friend .We wanted to buy an house and for me to finish college before trying for another child . Big mistake well my body is aging so I'm 23 now but my body is 38 because of all the treatment .. So we decided after a year of trying to finally get some help and I found out my husband sperm  ount is excellent but it's me I have 
hypothyroidism and my doctor put me on clomid and now I'm set up to get my thyroid checked on the 28 but I'm starting clomid on April 4 .. I'm confused on why I'm starting this   First has anyone had thyroid issues and clomid help u ovulate ???