I just had a little boy who is 2 months now. I had a cycle in the month of January after my 6weeks,but now in the month of February I have yet to have a cycle. I took a pregnancy test and it was negative. I have also started birth control but that was after I took the pregnancy test and it was negative. What could be the problem or is this normal after giving birth

Myeldest was 2 yesterday and when I had him myperiods were all screwd up because uve not had period for 9months,myother is 4 and ahalf months and it took 8weeks to get myperiod and I thort I was pregnant lol thank god I'm not.myperoids were allover the place then I got the depo and they were even worse,was on myperiod for 35days the doctor had to put me on the pill aswel to regulate them I'm hopein it works.if your worried go and see your doctor