Should I take a test

I gave birth 4 months ago and I got the iud a month and a half later but my period has been very weird since like the bleeding would only stop for a day or two and then pick back up again doctor say it was normal. My thing is now my body is behaving almost the extra same way when I found out I was pregnant with my son. I got my period the day after I had sex but still conceived we found out I was pregnant out of joking about my symptoms ( feeling like I wet myself but there is nothing, my teeth and boobs being really sensitive and my Constant spitting along with being nauseous) now some of these symptoms are happening again feeling like I wet myself, and The nausea and constant spitting and some really weird dreams (had this in the beginning of my pregnancy to) like today makes 1 month since we had sex and just like before I found out I was pregnant the two days before my missed period. And just like before all of the symptoms started at least one week before what was supposed to be my period. I know the chances of getting pregnant while on the IUD is very very very very very very small but as I have learned with my first pregnancy small doesn’t mean impossible so what should I do. Am I just freaking out or should I take another test? Or is some of the symptoms normal postpartum thing?