Could I be pregnant? Help!!!

Forgive me, I know nothing about pregnancy, or early signs of pregnancy. I started my period a bit early and I was bleeding and cramping but it wasn't anything heavy, and it didn't last very long. I've also been dry heaving at the thought of certain foods (like eggs, ugh!) But I haven't experienced any actual vomiting yet. I'm thinking the bleeding could have been implantation, but I'm also on the IUD but I haven't had it checked in a few months (idk how to check for the strings so I just have my doctor do it)... idk if I'm being irrational but I'm starting to think I'm pregnant?! And also I'm in a committed relationship (5 years now!) and being pregnant wouldn't be the worst thing ever but it's definitely not planned. I just want to know if I should get a pregnancy test or if I'm just worried about nothing.