Should I see my doctor?

So I have a 5 month old and I'm 13 weeks pregnant. I went for my 12 week scan and bloods and got given 7 days of strong antibiotics for a water infection I didn't even have any symptoms of. I have one day left and they seem to have made things worse I now have a lot of yellow/green discharge and the I am so uncomfortable. I my lady parts hurt there's that itchy. Is this just the tablets working or should I see my doctor? I had water infections with my first and only had 3 days of half the strength tablets and never had this problem.