I am going through this exact thing with my 9 month old son. Im sure your supply is absolutely fine if your little guy is growing so well!
At this age they are going through a lot and nurse for nurishment and for comfort. I believe in attachment parenting and nursing on demand no matter what the reason if you're there and can do it. My LO just started the separation anxiety stage, is about to cut a third tooth and is going through a growth spurt (2 inches in one month). He also started really crawling last month and has began babbling more distinctively. Add it all together and you get the need for mommy and comfort, ie boobies :)
If you have sore nipples ask your doctor for an rx for Dr. Newmans nipple cream, the pharmacy has to make it from scratch but its worth it. You can always try distracting him for a bit with play or a walk, sometimes it just doesnt work. Distracting with solids may only decrease your supply by lowering his demand.
I also BF exclusively with solids only once to twice per day. Your LO gets all he needs from you, solids are mainly to teach him how to eat. According to the World Health Organization BF is best til age 2. I've found that with all that nursing, you shouldnt expect too much from pumping. If I get 1-2 ounces from both breasts Im happy. I needed to pump for when Im away for a few hours now and then and my LO wont take formula. You said you pump while nursing, that sounds distracting since they are so interactive at this age. I used to pump while my LO played in the morning but had to stop once he started grabbing the pump. My formula for pumpling is Water + Time + Relaxation = Letdown = Milk. Try to wait at least an hour after the last feeding before pumping, I do it when the LO is napping. Keep drinking water when you wake up, we loose a lot of fluids when we sleep. Pump early in the day Ive been told and found true that your supply is best between 7-9am. Engage in a relaxing activity- listen to soothing music with eyes closed and cleansing breaths, read a magazing like "parents" with lots of pictures of babies, flip through pics of your LO. These all work for me, Ive tried reading my email and that actually has the opposite effect because Im thinking about all I have to do which isnt relaxing at all. Dont look at the pump during this time, its like watching a pot of water boil and can be stressful. The milk will flow (even if only a couple of oz's).
If you really want to increase your supply the following has worked for me:
1. massage the breasts in a warm shower before pumping
2. compress the breasts while pumping: http://www.breastfeedinginc.ca/ (type "increase supply" in the search window, this is a great resource out of Canada)
3. Keep using the fenugreek as the bottle reccommends it really is amazing stuff
4. Mothers Milk Tea is great! I would make a big pitcher of it since it needs to be steeped, add sugar and drink it cold
5. Barley Water: The recipie is at mobimotherhood.org under Lactogenic Foods and Herbs. Its amazing but very slimy and tastes horrible, the slimier the better. Make a batch and grab a swig whenever your near the fridge, have a juice chaser nearby.
6. The more you pump the more you'll get. Everytime you pump you send a message to your body that you need more milk. I lost my milk entirely at 3 and 6 months and my lactation consultant said to pump every 3-4 hours for 5-10 minutes even if you dont get anything...eventually you will and it will increase over time...it works.
**dont try all of these at once as you may become engorged, try one at a time and see what works for you.
With your love and attention to his needs your LO will grow to be a confident and secure little guy!
P.s. Im not a doctor, just a mommy who went through 2 bouts of lost milk and several decreases in supply due to thrush and mastitis.
Hang in there! XOXO