Babies close together.

Hey ladies, just wondering if anyone has experienced having babies so close together? I have 3 boys. My oldest is 9 and my youngest is nearly 7 months, and ive just fount out in pregnant again between 10/11 weeks. Havent been for a scan yet to confirm. But have any of you ladies been through the same. And how was your whole pregnancy/birth situations as im really worried my body hasnt had that much time to heal and may cause complications ect.. any stories will be great to ease my mind lol x