Just venting/ looking for encouragement

I’ve been “ST” since birth but now we’re 3mo and I’m now transitioning Into a more solid training.

Hearing him cry shakes my core I feel so bad. I keep telling myself he won’t be scared, he won’t get hurt. I’m doing a modified extinction but I think me going to check on him makes it worse.

Today he fell asleep and woke up soon after being put in the crib after 5min I checked on him but he didn’t calm. I didn’t check on him after 10min cause he was calm but not asleep. After about 25mjn of solid crying he’s now back asleep. *sigh* I’m glued to my monitor now freaking out anytime he moves xD

He sleeps through the night so I’m not ST at night yet. I still nurse him to sleep. I’m working on naps first.

Any other moms sleep training using modified extinction?

Update:

So second nap just finished. Baby was drowsy as I rocked him in the chair and wide awake when I put him down lol of course.

He cried for probably about 20-25min until he fell asleep. I decided I wasn’t going to check on him cause I feel like it makes it worse rather than better with my LO. Well he slept for 43min!