Do a test, if you are late already !!
I was sick and tired exactly like that before my period was even due- once it was late, I was sure- I did a test after I was a couple of days late- but I was pretty sure already.
Sure enough, tested positive, and I didn't even do it first thing in the morning- once I bought it at around midday- I just couldn't wait all the way 'till the next morning !!!!
I'm 31 weeks now- yay, only 9 weeks to go !!!!!!!
Do a test, and let us know !!!!!!