Is this a stye? TMI if that grosses you out

I've never had one. The picture really doesn't do it justice. It's really swollen in the morning and goes down throughout the day. The bump on my eyelid looks way bigger in person as well. I've had it for three days and don't know what to do about it. Call a doctor maybe? I'm not sure. I'm including that I'm 30 weeks pregnant even though that probably has nothing to do with it.