Need sleepy

Uuuggghhh! I am going out of my mind and looking for suggestions. I am in need of some good sleep. I know it is normal to be sleep deprived when you are a new mom, but this is extreme. There is no reason why I shouldn't be able to catch some halfway decent zzzzzzzzz's. I work nights, Colter goes to daycare during the day so I can sleep, and he goes to bed around 7:30 at night, allowing me more than enough time for a good nap before work. When I get home from work, I get on my treadmill and am usually in bed by 9:30. I can usually fall asleep right away, but I am back up by noon or 1pm. During this time, I toss and turn like mad. I feel like I am tossing at least every 10 minutes. Every time I move, the dogs think I am going to get up, so they start getting excited. After trying to go back to sleep for 1/2 hour or so, I finally give up and get up. After Colter goes to bed, it is more of the same. I could kick the dogs out of the bedroom, but our big dog would just bark at the wind, and my little one would constantly be scratching at the door. She has to be attached to my hip at all times. Besides, it is not their fault that I toss and turn constantly.

I have been buying new pillow after new pillow thinking it would solve the problem. I recently invested in a very expensive pillow, and it is very comfy. It has not put an end to my sleepless days, so I have finally excepted the fact that it is my mattress. I have been debating on what to buy. Do I buy a new mattress or invest in a memory foam pad. I really do not want to spend the money for a decent mattress, because I know it will be spendy. The only bed that I have found that I love, cost $5000, and I wouldn't spend that unless I was a billionaire! Do any of you have a memory foam pad, and what do you think of it? Do you have a mattress that you love that doesn't break the bank? I am begging for suggestions here!