Hello and thanks for your question.
I do have to say that I've not encountered that possible foreign-body in the eye before, but considering the bump on the eyelid as well as lower eyelid swelling and discomfort, I suspect that this is related to that bump and that you are experiencing a stye, which is a blocked oil gland in the eyelid. The oil spills out in the eyelid itself, inciting an immune reaction which causes the swelling and discomfort.
While I suppose it's possible that the semen in your eye was the cause, I think it is probably unlikely. I would recommend treating this stye as any other stye: hot compresses. But it may take more intensive treatment than you've been doing. Most styes will go away with doing hot compresses 4x/day, 10 minutes each time, as hot as you can tolerate without burning your skin (it should stay that hot the entire 10 minutes), but it may take up to 2-3 weeks of doing that before it goes away; you should also massage the bump while the hot compress is on it. If after 2-3 weeks it has not resolved then it may need to be cut open by your ophthalmologist if you want it gone still.
Now that being said, if the swelling gets dramatically worse, is accompanied by redness and even fever, or if there is significant yellowish-greenish discharge from the eye or the eye becomes significantly red or the vision starts to become significantly affected, then you should see your ophthalmologist right away as these are signs of possible infection.
Does this information help address your concerns? Does this make sense? Do you have any other concerns that I haven't addressed?
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My opinion is solely informative and does not constitute a formal medical opinion or recommendation. For a formal medical opinion and/or recommendation you must see an eye doctor.