What are your thoughts ( nap Qs)

Hi ladies! I've been fighting with DS for a while now. He is now 9.5 months old and I am not sure what is happening with naps and his overall sleep. He wakes up randomly at night sometimes he goes back to sleep on his own but sometimes I have to help. I think he is sleep trained but I may be wrong. Here is my issue. His first nap is usually at 9:30 am. Whether he wakes up at 6:30 am or 7 am. He has been taking two naps since 6 mo old and the second one was usually at 1 or 1:30. The am one was also earlier and he used to sleep longer. Now he usually takes two 1.5 hour long naps. But my question is regarding the second nap. I can't seem to get it right. Yesterday I took him up at 2:10 pm. I probably should mention he sleeps from 9:30 to 11 am. But he didnt fall asleep until 3 pm but he had pooped and i figured this affected him falling asleep so I had to rock him. Today I was followed the same plan. I laid him down in the am at 9:15 he was asleep by 9:30 am, woke up at 11. He seemed tired earlier so I took him to sleep at 1:30 he jumped around till 2:15. I tried rocking him but he was too awake. So I took him outside to start some gardening brought him up at 3 pm. Gave him a bottle laid him down. He played some more and just fell asleep at 3:30! I think he is teething but I am not sure. Sorry this is so long but I would appreciate any helpful ideas. It's hard to tell with him he rarely gives me any signs he is tired. If it helps his bedtime is 7:30. Thanks for your anticipated help