You REALLY should only melt lead out of doors. If you get lead hot enough, it will actually boil off into vapor, which you can breathe in. If you don't wear some sort of gloves ALL THE TIME. tiny bits of lead stick tenaciously to your skin. Washing with regular soap will not always remove it. Then when you eat something, you ingest some lead.
The same thing happens when you reload with lead bullets, and when you process fired cases. Your brass will have a thin coating of lead from both the burned base of the fired bullet, and the primer. Most primers, unless they are labeled 'lead free' contain lead styphenate as the primer compound. So the cases are fairly badly contaminated with lead, and some is in the easier to absorb lead salt form. Much worse then elemental lead.
When you fire lead bullets, you breathe in some lead from the primers, and burned and vaporized lead from the bullet bases. People who work as range officers in indoor ranges generally have to have serum lead levels run, as they breathe in lead all day long.
If you polish your cases, do it outside. I used to do it in my basement, and I had the case vibrator on a sheet of newspaper. A fine black powder would accumulate on the newspaper. I don't have a cover for my brass tumbler. I took some of the black powder to work and got a friend to test it, and it had a LOT of lead in it.
You can get lead on your hands from cleaning your guns, too. I have some special soap I bought at a gun show that is made to remove lead from your hands. I just looked for it, and I can't find it. I haven't cast bullets in some years now.
I had a blood test run back when I was shooting 700 rounds a week, every week, of cast bullets, and my lead level was 48mcg., almost at the 50mcg. level that OSHA considers harmful to adults. Of course children are WAY more susceptible to lead poisoning.
I started scrubbing my hands with Dawn dish washing liquid, and stiff bristle brush, moved the case cleaner out to the garage, and cleaned up as much as I could where I thought there was lead contamination. I was especially careful to really scrub my hands before I handled any food.
Slowly over time, my blood serum lead levels went down, and after 6 or 8 months it was half of what it had been. My doctor stopped testing me, as the level was relatively 'safe', and slowly and steadily decreasing.
I would say, as has been said, that you aren't suffering from acute lead poisoning. But, if you have health insurance, and can get it covered, it would be worth getting a lead level done. I would be surprised if you didn't have some lead in your bloodstream. Hopefully it's low and not a problem. Good luck.