Seeking Advice

Lately I feel like I've had trouble getting wet/lubricated when my partner and I are having sex, I also feel like I'm way too tight and not loosening up as I should be. When we first started dating I had no issues but we were both in high stress jobs at the time and I think that affected me but I am in a very low stress job now so I should be more relaxed.

Occasionally get pains in my right side about 2 inches above my hip when we are having sex with my partner. My doctor said it is probably just the way my organs are sitting at that particular moment which I am inclined to belive as it is not regular but often enough.

I am 23 verging on 24, relatively healthy, eat well and I try to drink plenty of water throughout the day, as well as cycle to and from work.

I feel like I have a lowish libido these days, I am not sure why and whilst I want to be intimate with my partner, I feel like because of my lowish libido I don't initiate it as much as he does. My doctor said unfortunately there isn't anything to assist with my low libido, I am almost 24 and I feel like I shouldn't be this blasè about whether we do or don't have sex.