How to spend less money? Ideas?

A❤️C

I'm 17 weeks pregnant. Because I'm 17 weeks pregnant I quit smoking, drinking, and drinking energy drinks. My husband also quit smoking. Because of this we should have an extra 500 dollars a month or more! We are trying to get a better place that we will spend like 500 dollars more on and I know we should be able to afford it but we are spending our exact paychecks monthly (we have other money saved to move from before) and I just dont understand how we are spending that much??? Any ideas how to lessen our spending or set a budget? I dont necessary need to save but we need to be able to afford A LOT more a month. I think we just got used to cheap living. We used to make waaaaay less and now we make so much more but pay the same for rent... but somehow still spending all our money.