Send help! Need sleep!

Moms please help! My son has been a great sleeper since he was 6 weeks old sleeping 8-12 hours a night! He is now 6 months old.

He usually goes right to sleep but at times he struggles to get to sleep and will cry himself to sleep (with no way to console him). He also has begun waking up every 2-4 hours every night and screams to get back to sleep. Usually if he wakes up around 4 am I give him a bottle because I’m sure he’s hungry. This is heartbreaking, hearing him cry all night and not knowing what to do. And I am physically and mentally exhausted from it. How can I get him to sleep through the night again?! Any suggestions?!

Please tell me I’m not alone!!!