My feet are always cold. Any remedies?

I am going for my second FET this month. My first one failed in October. My feet are always cold even wearing socks. I have heard it could be one of the reasons for imputation failure and I am worried because of it. I used to have hyperthyroid years back for almost 12 years and it was cured completely. Now it’s normal. My palms are also sweaty and cold sometimes I want it to work this time. I have never been pregnant in 4 years of trying so i am really anxious about it. I don’t know what could be the reason. Has anyone gone through something similar or can suggest something?