Bladder And Period Problems Need Advise ASAP!!!!

Rh

Hey guys,

Want some advise im 20 years old, I have had 2 little boys my oldest was 3 in June my youngest was 2 in April after I had my youngest his afterbirth come out with him after I pushed him out weighing 5lb 5 1/2 oz at 3 weeks early. I didnt have the injection to remove the rest of the placenta as it did already come out and nurses did give me the option to have it or not and I chose not to, ever since my periods have been all over the place missing 3 months periods to having a period each month, ive been in my new relationship with my best friend for over a year now and I still havent catched and we really want another baby, plus after having my youngest son my bladder has gone extremely weak so ive got to wear a pad at all times please can anyone give me any advise will be very appreciated thank you :)