TTC help!

Hey everyone ! So me and my boyfriend has been trying for 4 months now , AF usually starts on the 4th which is today but there's know sign of it! I've been waking up nauseous for the past week, I'm more thirsty, I sleep in alot more, Headaches here & there, Not to much tingling from my breast but my veins are very much more see-able on my breast ! Could I be pregnant??