Delay period

So I was supposed to get my period three days ago. It is late. I am not pregnant. Took a test. It’s never usually like this and of all weekends my husband and are going away for the first time just the two of us this weekend. Kid free! I am afraid it will start before we leave. Is there anything I can do to delay it? I heard of a pill but it kind of scares me because of the chance of blood clots. Any insight?