what is wrong with my body?

I don't know but I feel like im in the worst health. (no I don't have Ebola) or anything like that lol. it's just my urinary tract and my periods. I need advice.. help? something. 
​problem one, is that my pee has a really foul, or strong odor. and very dark yellow. ive had a uti in the past that i cured naturally but never took antibiotics for. could that have something to do with it?
​problem 2, my period is too light. im on birth control and im on my "sugar pills" now. the ones with no medicine in them so that i can get my "period". but i barely even need to wear panty liners. is that okay? 
​I just need some input.