I know I know

I know that you aren't supposed to look for any signs of early symptoms because can be misleading & "not possible" but I'm only 3 dpo and all day long have had a headache and had a headache yesterday, always bloating which is odd because I only bloat whenever I'm on my period and 3 months ago I had a chemical pregnancy and a symptom I had was bloating since I had ovulated . Also , I keep feeling nauseated . I take prenatal but I also eat after I take them . Again I know it's so early but come on .. when people are pregnant they know just by how they feel , you body feels different . Is it possible you can just tell ? Even if it's early ?