Std maybe?

I’ve been with my partner for 2 months now, we’ve had lots of sex I won’t lie. We had sex last night and used lube for the first time (no particular reason just a bit of fun). He told me that his dick and around it has been very itchy today, and he’s got discharge from his penis. Before we met the last time I had sex was December 2020 and the last time he had sex was October 2020. If it was an STD, Would we have had something like itchiness before this and not two months in? Or could he be having a late reaction to something? I’ve not had any irritation or anything! could this just be a reaction to the lube? . I’ve gotten very paranoid and ordered myself a test kit for several STDs just to cover my back but does anyone have any idea what this could be? Thanks