Help! I need advice!

Ok so from about 2 weeks until now (he's 10 weeks) our son has slept 5-8 hours a night. Now it's a struggle to get him to sleep at all! We're doing the same routine; bath (every other night), lotion, diaper change, bottle, swaddle then bed. We still use the sound machine with rain noise like always and try to get him in bed at 9-9:30. Idk if it's sleep regression or what?! Any ideas? Advice?