Weird things happening to me

So I don't know if this could be a sign of pregnancy or my body just being wierd, but with that being said I have super bad nausea but just not throwing up, headaches that last all day sometimes, and this part is probably the worse but when I burp it's lik straight sulfur smelling while yes I consider heart burn could cause they but I haven't heartburn at all.. This just started happening the last like 3 days.. Anyone else having these symptoms or is my body is just crazy?!