Uti symptoms

So I’ve been on my period for 4 days now, it last night I started with this feeling that I’m not emptying my bladder fully every time I go pee. I don’t have the burning sensation, but I am peeing more because every time I pee I feel like I still have to pee and I have that pressure like I need to. I have never had a uti before but I feel like that’s what I am experiencing. Is this a uti or something else? If it is a uti can I use over the counter azos?