What can I do?

M
I started talked to my ex boyfriend from 2009 and I like the chemistry that we have, we make out three  times without condom and I didn't take any pill and I have a IUD but I think it's not working because I have 6 years with that, I think I'm pregnant and he doesn't answer the phone and respond my messages, what you think I can do? 
I had symptoms like breast tenderness, nausea, feel sleepy and tired all the time. 
Sorry for the typo I'm latin 😐