Can you help me?

Zasha • 24.Happily married 😍 I have a prince of 8 months and Pregnant with baby #2 due date DEC 19 2017.
Hi girls ... I just need some help... The last week I had a weird cycle it was very light and short .. Today I've been with upset stomach , diarrhea and indigestion. Should I take a test or wait for the other cycle to come to know that Im not pregnant...??