repost, help! late period, hookups

my boyfriend and i broke up 3 weeks ago. i have hooked up with two people since then. the first was two days before predicted ovulation and he wore a condom + didn’t finish inside. the second was abt a week after and he wore a condom + didn’t finish BUT the condom came off at some point & he didn’t tell me. it was literally stuck inside me. i have been so nauseous for days now and my period was supposed to start today but didn’t

should i just wait it out? take a test? do i have to tell them that it’s late? i want to do the right thing.