Can you get PPD later on when your baby is a toddler if it took that long for your period to come back?

I had my period one time, and ever since pretty much like 2 months before Ive been more emotional and irritable. I gained 10lbs in water bloat. I feel like I lost my strength and energy and when I used to enjoy working out, I hate it now. I feel tired a lot. I feel dizzy a lot. I get confused and have memory problems. I also drop things a lot. I am very overwhelmed by my son whom is a sweet boy. I feel like a terrible parent. I tried going out, I tried shopping, I tried drinking, I tried eating healthy. Nothings working. I'm starting fights with my spouse and parents and driving everyone bonkers.

I don't know if this is normal and I should just learn to deal with it, or something else.

Any advice?