HELP!

I need help! im a first time mom and my 7 month and 16 days baby is having touble sleeping. he only takes 2 - 3 naps a day and their all 45 mins or less. never longer and i know for sure because i measure with the app. so he takes on late morning like 10 or 11 because hes an early riser, he wakes up at 7:00 the latest he ever woke up is 8:40. ans he'll take another around 1 or 2 and sometimes another at 3 or 4 sometimes 5. now i know what your thinking ... hes having trouble sleeping because ur over alewping him during the day. well let me just throw out there that ive tried to skip the last nap of the day so he will be more tired for bed timw which ranges from 7:30 to about 9 usually is never later unless we're out. He is a very big boy he looks like hes 1 but isnt. so i have trouble trying to put him to sleep in my arms. so i rock him to sleep in his bouncer and ill put him still insidw the bouncer inside his crib. then after his first feeding during the night i take him out if the bouncer and put him into the crib ... inbetween feedings be tosses and turns so much ... its getting to this point where is so annoying because he wakes himswlf up and just cries until he is rocked back into the bouncer. so i thought fine just so i could rest ill let u sleep in there one night and still the same tossing and turning... he doesnt just relax ...what do i do? he has no teeth still but he i put him orajel when i think it could be that and even through the night ... ive even gave him pain reliever before bed so he could rest well and still tossing and turning ...im fed up its bwen going on for about 2 months almost... desperite ! help!