Don't ignore it. Everytime I ignored my intuition and listened to my head instead of my gut feeling, I regretted it afterwards. Sometimes, you have to be couragous and just jump into the cold water.
A few weeks ago, a girl ask me to start a flat share and it just felt off. It wasn't because of the girl, but because I wanted to live by myself. I needed to find someone who moved in with me or an apartment for me fast and it was hard to find a flatmate (she was the first one within weeks). Nevertheless, I turned her down, because my feeling told me that this definitely wasn't what I wanted.