Progesterone pesseries anyone?

Laura
Hi all,
​I'm new to all this and just wondered if there was anyone in a similar situation?
​I have been diagnosed with unexplained infertility, with tests coming back clear. 
​I have just had my third IUI and I'm on the 2ww with 1w to go. I am also taking progesterone pesseries and wanted to know what kind of side effects others had experienced?
​Any help would be great.