Hip Pain

I have been sleeping absolutely terrible at night, especially the last few weeks. There are 2 major problems, my hips are in severe pain & I have to pee. I'm not quite sure which one is actually waking me, but when I wake up all I know is I'm hurting & I also have to go to the bathroom.
Before getting pregnant I was always one to sleep on my side, especially on my left which is a major plus for preggers because doctors say it improves circulation. My 2nd sleeping position is on my back & occasionally on my right side. Sleeping on your back after the 1st trimester is a major no no when pregnant because the baby's weight can press on your major vein & can diminish blood flow to your brain and uterus, and can make you dizzy, short of breath, or nauseated. So at night I try & stay on my sides, especially my left side. When I wake up both my hips are in so much pain, especially the side I was sleeping on....so I get up, walk to the bathroom which will stretch things out a bit, pee then go back to bed & lay on the opposite side. I do this about 6 times a night. I googled about this & it was recommended putting a pillow between your knees which I started doing. The pillow I was using was very thin & didn't seem to be helping much. My bed is also a firm bed so I'm sure that's adding to the pain too.
I can't take much more of this so I went online last night before bed & bought the All Nighter Total Body Pregnancy Pillow by Leachco from Walmart, especially since I still had $45 left from a $100 Walmart gift card I got for Xmas. I couldn't decide between the one I got & the Snoogle, they both had great reviews. I picked the one I bought because one of the positions the lady is in in the picture is on her back. I don't plan to lay directly on my back but kind of on a slant so this is the one I bought. I can't wait until it come & when it does I will definitely write a review.
Last night was the first night in a few weeks that I slept really good. Well, better than normal...I only woke up about 3 times instead of 6+ & I wasn't in terrible pain. I had also used a fluffier pillow between my legs & I had worked all day so when I got home I was super tired so that might have helped a bit. I'm sure the *real* reason I slept well was because after a huge chunk of sleep I woke up on my back which I am very unhappy about. I then went back to sleep on my side & used the bigger pillow that really seemed to help a lot. When I woke up this morning I felt the baby kicking so I'm guessing the laying on my back this time didn't do anything to my little one, thank god. Lets see if this will continue or if it was just a one time deal. I will continue to use the fluffier & see....I just can't wait to get my pregnancy pillow!

UPDATE: using a thicker pillow between my legs made a big difference....I really didn't have pain in my hips since using a thicker pillow...yay!