missed period

Hey guys so I’m on the combination pill( been on it since September) and I used to bleed on the second week of the pack and on my 4 day placebo break. I’ve been having sex with my boyfriend but we always use a condom and I never miss a pill. only a couple times I’ve taken a pill a couple of hours late but I make sure not to have sex at all 2-3 days after. I haven’t bled at all on the pack I just ended (started my new pack today). What are the chances I’m pregnant? I don’t want to go buy a test if the chances are low Bc that’s a waste of money but I need to know if I’m pregnant or not 😅