OTC meds while TTC?

Lainey • Due with Baby #1 Nov. 2016!
So I have bad allergies and I think I have a sinus infection now. Normally I would go fans something like Advil Cold & Sinus, but I'm in tww and not sure if I should avoid it. Anybody have any info on Otc meds while TTC? I mean - I technically could be pregnant but I'd hate to walk around sick for the next two weeks (and potentially let it get worse), for no reason.