What can I do?

Im exclusively breastfeeding and for the first 3 weeks (hes 5 weeks now) my son slept well and when he did wake up after I feed him and changed his diaper he would go back to sleep. I coslept with him the first 3 weeks then the last 2 weeks Ive put him in his basinet. The first week I done it he was fine sleeping the same but this last week he hasn't been ill get him to sleep and put him in and he stays asleep for 10 minutes-1 hour then he wakes up again. Ive tried swaddling him, rocking him, letting him fall asleep on me or in the bed then putting him in the basinet. Is this normal? Or maybe just a phase? Should I maybe try to get him to stay awake in the day more? Or make him stay up 3-4 hours before bed? Im so sleep deprived and i really dont want to give up breast feeding cause my goal is to make it to a year minimum cause that's when cows milk can be introduced.