I dont know what to do

So I'm afraid I may be pregnant. I already have a two year old son and hes a handful. I think about getting an abortion but I honestly wouldnt be able to go through with it without feeling guilty and regretful for the rest of my life. I just feel sad that I wont he able to spend as much time with my son if I decide to keep this baby. That's what's bothering me the most. Hes a huge mommas boy so I know it wouldn't go well. Everything is just so easy with one child right now. I dont know what to do. Any advice?