Inconsistent sleeper

So my son is probably the worst sleeper ever😩 he is now 7mo and I feel like his sleep patterns keep getting worse! At least as a newborn we knew he would sleep for 3 hours straight! We have literally tried every sleep method there is and nothing is working. He doesn’t even sleep good in our bed with us. When we tried CIO, he only got louder and louder and couldn’t go back to sleep. We put him down and we have no idea when he will wake up-could be a few hours or could be 15 min later. My husband and I are so exhausted. I don’t know what else to do. Any advice would be great!