This is third time,one after menses we have sexual intrcourse,for 3 consective days,, now I have urinary tract infection?
Is this related to pregnancy?I mean to say does this effect pregnancy?

No, it won't affect pregnancy. Do you urinate right after sex? Are you practicing good hygiene before, during and after sex? 3 consecutive days of intercourse is a lot. During that time you need to make sure hands, fingers and other things used in area of the vagina and urethra are cleaned often, including the mouth. You should use a good lubricant that doesn't cause more problems. During sex, germs get forced into the urethra through friction. That's why you should always try to urinate right after to help get rid of most of the germs but good hygiene is the key to preventing uti's.