C.M.
My first baby was just 5 pounds and wasn't interested in breastfeeding or eating at all for that matter. I pumped for the first 6 weeks and gave the breastmilk to her in a bottle. It worked fine, but was exhausting, so I decided to stop breastfeeding. I went to the doctor and got the dry-up pills, limited my liquids, wore a tight bra etc. I thought my milk was gone. All it took was a warm shower, no bra for 4 or 5 hours and my milk was back AND I had a breast infection. Oh my...I would have preferred giving birth again rather than have the pain it caused. I had a 103 fever and red streaks going down my arm. I knew it was because I had quit nursing and things got clogged up. When my 2nd baby arrived I was determined to have a successful nursing experience and I, like you was afraid I would for whatever reason get another infection. #2 was a very hungry girl! On the advice of all the wonderful moms in my Le Leche League group, I never had a problem. #3 came along and all was well with her too! The best thing they told me was to always nurse til you are empty, nurse often on demand, stay away from bras that are too tight or underwires as they can restrict the proper flow of the milk and cause your milk ducts to clog and head you right into trouble. Be sure to stay hydrated too.
You might want to talk with a lactation consultant or contact a Le Leche League group leader. I'm sure they could ease your mind. The book, "The Womanly Art of Breastfeeding" was my breastfeeding "bible". Congrats on the new baby coming! I hope all goes well for you!