could I be pregnant??

Ashleigh
Hey ladies. So my last period was October 28-October 31st ( 4 days) I am 18 days late according to <a href="https://play.google.com/store/apps/details?id=com.glow.android.eve">eve</a>. I haven't had a November period at all. Still no period in December yet. I took a test today and it was negative.  I last had sex on November 8th and the condom did break and the sperm did go inside of me. I have been having nausea and my boobs have been hurting and I've been having a metallic taste in my mouth for some reason. I don't know if it's to early for the test to show anything or not but I could really use some advice!!