I am by no means a health professional at all, but my midwives seemed to be most interested in my hemoglobin to determine my iron levels. I'm looking at my lab report right now and it looks like the RBC values you're looking at are an actual numeric count, as opposed to a percentage or grams/dL or something, so to me it doesn't sound like 3.62 is a LOT lower than 3.77, especially if the hemoglobin and hematocrit are normal. But again, I am not a professional!
If indeed you are somewhat anemic, I would try eating dried fruits and nuts for snacks, especially pumpkin seeds! It's also super helpful to cook in cast iron pans, especially acidic stuff like spaghetti sauce, because that's an instant iron boost without the iron-y flavor. Blackstrap molasses mixed with hot water makes a pretty tasty, iron-rich drink. Leafy greens are also great; spinach is not my favorite because of high oxalic acid, but all of them have iron.
I've been vegetarian for 15 years and vegan for almost 10 and my hemoglobin was 13.6. I've done all of the above only sporadically (other than cooking with cast iron, I do that every day), so it's good to know that I have options that seem to work that I can pay a lot closer attention to if I need to. I really like to avoid supplements if possible, and iron supplements are notoriously rough.