anyone gone through this

this will be anon as I feel so down that people might judge the hell out of me..:(

My son is four months old and my daughter is two next week and I took a test yesterday that looks so faint, I'm off to the doctors and I'm just freaking out, my partner never came in me and we have only had sex since my period on the 20th of October and I'm due in 10 days..

My partner is set on the A word if I am and I can't put my heart into doing that..

I'm confused I don't know what to do, I feel awful and guilty and can't believe I let this happen, I am on the pill I'm so confused, my question is has anyone had three kids under 3 ??