STD? Please help.

So I’ve been sick with the flu since last week but I feel much better. Around last Monday I noticed a lot of discharge. So I checked the app and it says I was ovulating so I didn’t think much of it. But it’s been like that since and it’s been so much that I’ve had to change underwear twice sometimes three times a day. And when I wipe I notice red or orange spots and little bumps that hurt a little when wiping. Last time I had sex was about 3 weeks ago and it was unprotected. What should I do?