The code for GA is still in your page
<script>
(function(i,s,o,g,r,a,m){i['GoogleAnalyticsObject']=r;i[r]=i[r]||function(){
(i[r].q=i[r].q||[]).push(arguments)},i[r].l=1*new Date();a=s.createElement(o),
m=s.getElementsByTagName(o)[0];a.async=1;a.src=g;m.parentNode.insertBefore(a,m)
})(window,document,'script','//www.google-analytics.com/analytics.js','ga');
ga('create', 'UA-8123456-1', { 'cookieDomain': 'www.yeastinfectionsinwomen.com' } );
ga('require', 'displayfeatures');
ga('require', 'ec');
ga('require', 'linkid', 'linkid.js');
ga('send', 'pageview');
</script>
So it should be working. Regarding banners, you can search Plugins repository for some that will fit your needs – https://www.ads-software.com/plugins-wp/
And a word of advice. If you think you’ll attract huge number of visitors to your site, especially from search results, with the content like you have there, well you’re in for a huge unpleasant surprise.