Use social media to get the word out and call on all the close neighbors, put up posters with her photo, work with the local authorities who do animal control. Call the veterinarians in the area. She will most likely be pregnant when she's located so find someone with experience in taking care of expectant cats to help you or to take her until kittens are born. Then... as soon as possible, get her spayed. Reevaluate and adjust your budget so that you don't have to wait so long for important medical procedures.

 

I agree with Nebraska...mostly!
I would suggest getting her spayed immediately upon return....unless you are prepared to take care of kittens...that will also need to find good homes...
IF spaying is done immediately, there won't be any complications...
She will need to go to the vet anyway for a good check over, to look for bites, wounds, etc...
You certainly don't want her to get an infection of some kind!
All Paws Crossed for her, and You!
Hope you are both reunited soon!
Sharon

 

Im with Sharon, as soon as she'd found then it's off to be spayed. Now that you know how determined a cat in heat can be to escape and find a mate you know it needs to be done ASAP and NO kittens that this might happen to as well.

As Jeff said, in future try to be a little more prepared when adopting.

 

She can stay in her cycle for 7 - 10 days, so I'm afraid she's not going to want to come home for a while. There's a good chance she'll stay in the area if there are enough males around. They will most likely not let her leave anyway.
I've had cats disappear on me for up to 3 days (and they weren't in heat), just really roaming.
Put posters up in the area and make sure the local vet and shelters know you are missing a kitty.

 

I plan on getting her spayed the moment I find her, my others were spayed at 6 months and 11 months. I will admit I took my new baby on very quickly as the previous owner kicked her out and I didn't want to waste any time, so I wasn't really prepared. She's had her needles from me, but I just needed to save a bit more to get her neutered and chipped and then this happened

I've plastered pictures and details of her all over facebook groups and pages in hopes someone will contact me. I've left all my contact details with local vets and pet centres in case anyone hands her in.

I've put out her blanket which has her scent on it along with some treats in hope it'll bring her back home is that a good idea?

 

If you have used litter, put some out - their own smell can draw cats back.

Go to neighbouring hoses and put leaflets through their doors.

If you know anyone in the area with an un-neutered Tom, ask the if they've seen him hanging around anywhere and check the area out.

 

Social media, talk to every neighbor face to face, police, animal control, vets and all shelters. Does animal control take the animals to a shelter or do they have their own? Visit every shelter, humane society, animal control shelter, EVERY DAY IN PERSON. I have heard so many stories about people calling every day, and yet finding out too late that the cat was there all along and had been euthanized.
Please keep us updated and you and your cat are in my prayers!