Pregnant again after being pregnant last year advice

My youngest just turned 1 year old in February and I’m exclusively breastfeeding and me and my hubby were using protection but did always say if a baby comes along we will be fine with it & we believe things happen for a reason . We were careful and my periods are always irregular after having my second son who’s always on the boobie ! No matter what . I’ve been noticing pregnancy symptoms as I’m craving soda more when I’m not really a soda person and just feeling more bloated than usual & it’s been making me super nervous but still in denial because of us being careful with protection but I couldnt help but think could I be pregnant and my hubby has been super fatigue lately and he has felt like I am pregnant because he always felt my symptoms with my pregnancies . Today I noticed slight bleeeding and I started to get hot and am super nervous about being pregnant again , just because my little one is still little & just thinking about 3 kids within a short time has me nervous . I grew up with 4 siblings and my parent was a single mom so just seeing how stressed she was made me scared to have a big family but yet I loved the idea of a big family because I always loved having a big family until my parents divorced when I was a young girl . Anyways my point is that , can anyone relate about being pregnant right after their little one and how they felt when they found out and how they do it with how many kids? . I’m just nervous but excited . I’m also 20 years old and am going to school for a medical assistant and attending cosmetology school online . Me and my fiancé have been together for 9 years and engaged for 4 years .