Trying to conceive

Mackenzie • Wife. Mommy. Teacher. Infertility. TTC baby #2

My husband an I are trying conceive. We have been trying for the past 2-3 months. I’m concerned because I have O- blood. I already have a child. From researching I’ve found that it may be harder to conceive the second time around. Has anyone had this problem? Should we keep trying? Should we see someone about fertility?