Mama, congrats sa positive PT! Actually, a few of us in our circle got our boosters right before or during early pregnancy din, and our babies turned out perfectly fine, pero para sa peace of mind mo talaga, best approach is to mention it sa OB mo agad sa first check-up, kasi siya ang makaka-assess ng timeline at lahat ng details ng case mo specifically. Ang timing mo (booster early Feb, positive test this month) ay malayo na sa actual conception window based sa last period mo, so medically yan ay hindi problema, pero let your doctor confirm na mismo para sure ka completely at ma-address lahat ng questions mo. Congratulations ulit, and wag mag-worry too much, marami sa atin ang naging okay!