Yes, actually doing magick lights you up and makes you interesting to look at on the astral. This is why you learn to cleanse and banish and keep your space clean of unwanted energy. It’s like cleaning the kitchen before you start cooking.
The question is, what were you thinking, what was your intention when you drew the sigil? If you did it with intent and wantedthings to come, then they can.
Be mindful of your thoughts and control your space. If you don’t want these, set it up that way before you start. Claim the space, declare it to be yours and that no uninvited entities may enter, by your will.
Follow basic spiritual hygiene to avoid attracting unwanted interference:
Unless you anted this, in which case work worth it, ask these entities who they are. Develop your senses by practicing on them. But don’t believe anything they say about who they are because they are randoms, just give them your own names and treat them as they treat you.