4-5 month old behavior

Hi all,

I'm a ftm and my son's been acting strangely for the last few weeks. I wanted to know if anyone was experiencing/ had experienced something similar and hopefully get some advice. Tre will be 5 months in a few days and here are the changes in behavior:

- feeding for only five minutes at a time (ebf, total amount of feedings per day are around 3 hours). he used to eat for about 20 minutes average

- very clingy. hates to be put down, doesn't seem to enjoy tummy time anymore

- longer naps during the day (averaging an hour to an hour and a half), but taking longer to fall asleep at night. he wakes up consistently at 7 a.m. though

- so much crying. everytime he gets all red in the face, it breaks my heart, and I'm on my own during the day, so it's a lot to handle

I thought maybe he's teething because he's chewing on things more, but he doesn't seem to have any sensitivity and no teeth have come through yet. I also thought maybe it's a growth spurt, but wouldn't he be eating more, not less? Any and all helpful comments are appreciated; I'm starting to feel like I'm failing him. 🙁🙁