Hen do when pregnant

Felecia
I'm really torn, my best friend is getting married in August and I'm due first week in September. Her hen do is June in Portugal, I'll be around 25 weeks pregnant and really not comfortable going just in case anything happens. When I told her I wasn't 100% she was very upset. This is my second (well first was 10 years ago) but she doesn't have any children. Is that why she doesn't get it.? What are your thoughts? Am I letting her down?