UTI confusion

So I think I have a UTI but I’m not for sure because I’ve never had one lately I’ve been feeling like I have to pee a lot and after I pee I still like I have to pee and when I’m almost done peeing my vagina kinda like shakes its hard to explain do y’all think I have one and if I do have a UTI what should I do does cranberry juice and pills actually work?