Cystitis help?!

Hi all, I just wondered if someone could help me out:

I am currently 6wks2days and me and my partner had sex at the weekend. Since then, I have been experiencing stinging sensations when I wee, similar to cystitis. I’ve had UTIs before and know they are common in early pregnancy. I just didn’t know whether to call the doctors (if they could do anything at the moment) or wait for it to pass? It’s been going on for about 3/4 days now and isn’t as painful each time so I think it’s getting better.