I want another baby

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In like a year or two but I also want to finish college. I was thinking of asking my husband of maybe trying for another next year after our son turns a year and 4 months because then our next baby will arrive when our son is 2 years old but then I remembered I want to finish college first and that's going to take atleast 4 years maybe even more 😭 has anyone had two children and still finish college? We want four children and we don't want them to far apart either. Any advice?