I have been bloated for about 5 days...but I still haven't started my period...my body's been sore too...I hav?

I have been bloated for about 5 days...but I still haven't started my period...my body's been sore too...I have been nauseated too...but I don't know if I've been nauseated because I have not had any sleep because I started a new job and have had to be up at 3 in the morning and I have been drinking caffeine to stay up and I hardly ever drink caffeine. I am kind of worried I might be pregnant...but I do not know how because we use condoms every time...and I fill the condoms with water to make sure there's no holes in them afterwards...what do y'all think?