please help me serious advice needed?

I had sex on the 10th and 26th and 27th june both were protected and everything in tact but for extra precaution I took the morning after pill twice one on 10th june and 27th june, had my period 17th june for 4 days which seemed normal. now awaiting my next period which should be 17th july. I also went to get tested for std's on the 25th june which was two weeks after the first occasion results all negative ive now on Friday just gone went to my gp who done another std screening as I am having the symptoms of constantly wanting to pee and feeling pressure on my bladder all the time I don't have any pain or discharge or bleeding. my questions are these?

1) will the std screening my gp has done rule out stds like chalymdia and gonorrhoea as she said it will since the last time was 7 days prior?

2) could me taking two morning after pills in one cycle be causing these uti symptoms?

3) if you have chalymdia in the throat can a swab from vagina still pick it up?