I'm leading up to OV, starting to get fertile CM, etc.
Yesterday evening I had a fair bit of EWCM.
Last night I took an antihistamine before bed because I'm a bit congested, not intentionally to dry up CM. It's Actifed if that matters...
This morning and most of today I seem to have either no CM or small amounts of dry-creamy CM. Is this normal? Does an antihistamine make CM vanish completely, or dry it up making it seem less fertile? How long does this effect last?

