Virus/malware/security issue?

so as of lately ive noticed alot of weird stuff has been happening to me. Facebook account being hacked. Weird emails im getting and of just now someone making a yahoo account or something and me getting a phone call with a verification code sent to my voicemail. Is there a way to find out if my security on the ipad and iphone is compromised or is still good? I don't use anything to use facebook and other stuff. Only ipad and iphone.