Everyone else has coverd it, but with respect to them not telling you they were trying and feeling "lied to", yabu on that too am afraid. You have chosen to be open with people on TTC, but that doesn't mean you are owed the same level of openness in return, it doesn't work like that. on such a personal issue people make different decisions about what information to share.
A fertility specialist told us that the average length of time taken to conceive is 6-9 months, longer depending on factors such as age.
A few people on here suggesting that OP "relax", this seems to be ubiquitous advice to anyone fretting about ttc or staying pregnant, and it's really not helpful, can just add to the pressure and make couples feel that the problems are their fault for not relaxing! Lots of discussion on other forums of the unhelpfulness of this advice.
yesterday I met up with a friend of friend who is now happily 6months pregnant after 10 years of trying (pregnancy through ivf, many attempts), at a child's birthday party. Several people who hardly knew her but knew the couple had struggled ttc (they have been open about it) were saying things like, "well, see what happens when you relax about it"! Wtf? How rude and ignorant! She handled it admirably, must've been hard.
OP, there is really good support elsewhere on MN and on other sites like baby and bump. When we had problems and I felt jealous, sad etc I found it really helpful to vent there, and then behave well in RL! It's fine to feel upset, but not fine to behave like a diva.