K.Z.
That is totally a personal question! People can tell you what they did, but you have to do what is best for you and your baby. I hope you can find the answers you are looking for and you should look into every resource available to you. Check out La Leche League (the Hillsboro meetings are on the first Monday of each month, so one is coming up!) I found the link for you: http://www.lllusa.org/web/HillsboroOR.html They are very nice and extremely knowledgable. Don't worry if it's your first meeting, they are all friendly mamas in there, just like you, looking for answers and support. Also talk with someone at Nursing Mother's Council, they have seen everything and I think they can send someone to your house if you want. And there is an Attachment Parenting group that has regular meetups with other moms. Many are nursing toddlers so you'd be in good company! Knowing someone to talk to in person may help you figure things out.
I would not consult your pediatrician. They are not the baby's mother and rarely know what to say about breastfeeding. Their charts are for formula babies anyway, so your baby may be just fine. If you and your husband are thin, maybe that is his body type. Ask any of the 3 groups I listed above for better advice.
Your child may not want solids yet and there is nothing wrong with that. Try to offer it to him anyway, but don't be upset if he doesn't eat it or only nibbles. You are only responsible for putting healthy food options in front of him. He is responsible for eating and deciding how much. Some children just want mommy. Make sure your diet is high in protein and healthy, not junk foods, that way you'll know he is getting the best you can offer when he nurses.
That said, I went through the same thing. I also had the feelings of wanting to wean when he was nursing 5x a night! I thought it would never end!! But I can say that around 16 mos he started sleeping throught the night better (maybe waking 1 or 2 times to nurse) and by 22 mos can sleep through the night without nursing (about 10 hours). Babies are all so different. I wanted to pay attention to my child's cues and know what he needed and what he could live without. When he was nursing so much and I was getting touched out, I tried to deny him the breast, saying he didn't need it and offer him other drinks and foods. He would throw fits and scream and cry so I knew it was not time to wean. I was frustrated and once I began to feel OK with nursing again, and he saw that he could get it when he needed it, he actually slowed pace and cut out 2 feedings a day. He just needed to know it was there, as it always had been.
I hope there is something here that helps! You can email me if you wish. I am still nursing a 26 mo old and he still very much "needs" it. We will wean whenever he is ready.
K.