Toddler won't sleep

🐵🦉🦖🦊 • SAHM 🧒JEC 5/12/11 🧒CIC 3/20/14 🧒IJC 3/25/16 👼JRC 9/7/17 - 5/31/18
Help me!! My youngest will be 2 March 20th. He has been refusing naps for some time now. I try every day to get him to take one but he wont. He goes to bed at 8pm wakes around 8am and about 12 12:30PM is when I would normally have his down for his nap. But for about a month or so he will not take his nap. He still needs it he's so tired by dinner time I'm having to fight him to stay awake. Around 5 is when he gets really sleepy and by 6 he's crashing. He acts tired for his naps too. I'll take him to bed with his bottle and his eyes will be heavy but as soon as his bottle is empty he jumps up and I can't get him to sleep. I've tried for 2 hours some days just to get him a little nap in but he wont sleep. And here recently at night he's waking 10+ times. He wakes up cries a bit I lay him back down give him his pacifier and he goes back to sleep for maybe 45 mins to an hour and wakes again. I'm so tired he's tired. Idk what to do. I also have a 4yr old and am 8 months pregnant. This is messing with us all so bad