Gained weight or pregnant ?

So as I was taking a shower like most girls do I was checking out my reflection to make sure everything is good, but when I looked I saw my belly at a sideways angle ( the worst angle) how big my actual belly had gotten. Legitimately it looks like I’m either a few months pregnant or I just gained all this from eating... which also scared me a bit. My breast are tender o had a headache I work in a warehouse so I’m always tired I had a few symptoms but it could be nothing as well... but if there’s a chance I am, I’d be kicked out the house and be pregnant and homeless. I had last months period but know you can STILL get pregnant while on or during period. I still have a week or so left until it’s due but now I scared myself...